Base | Representation |
---|---|
bin | 1001000011011111… |
… | …0101100011011101 |
3 | 20021101112001112201 |
4 | 2100313311203131 |
5 | 14434210301011 |
6 | 1041103131501 |
7 | 114142250131 |
oct | 22067654335 |
9 | 6241461481 |
10 | 2430556381 |
11 | 1037a92a90 |
12 | 579ba3b91 |
13 | 2c9726c56 |
14 | 190b353c1 |
15 | e35aecc1 |
hex | 90df58dd |
2430556381 has 32 divisors (see below), whose sum is σ = 2883196800. Its totient is φ = 2027047680.
The previous prime is 2430556379. The next prime is 2430556393. The reversal of 2430556381 is 1836550342.
It is a 4-Lehmer number, since φ(2430556381) divides (2430556381-1)4.
It is a cyclic number.
It is a Carmichael number.
It is not a de Polignac number, because 2430556381 - 21 = 2430556379 is a prime.
It is a super-2 number, since 2×24305563812 = 11815208642439634322, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (37).
It is a deceptive number, since it divides R2430556380.
It is a self number, because there is not a number n which added to its sum of digits gives 2430556381.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2430556321) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 505135 + ... + 509923.
It is an arithmetic number, because the mean of its divisors is an integer number (90099900).
It is a Poulet number, since it divides 22430556380-1.
Almost surely, 22430556381 is an apocalyptic number.
It is an amenable number.
2430556381 is a deficient number, since it is larger than the sum of its proper divisors (452640419).
2430556381 is a wasteful number, since it uses less digits than its factorization.
2430556381 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 4909.
The product of its (nonzero) digits is 86400, while the sum is 37.
The square root of 2430556381 is about 49300.6732306974. The cubic root of 2430556381 is about 1344.5240238923.
The spelling of 2430556381 in words is "two billion, four hundred thirty million, five hundred fifty-six thousand, three hundred eighty-one".
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