Base | Representation |
---|---|
bin | 111011111001… |
… | …1100011010011 |
3 | 2012002121022222 |
4 | 1313303203103 |
5 | 31020000131 |
6 | 3041051255 |
7 | 530643350 |
oct | 167634323 |
9 | 65077288 |
10 | 31406291 |
11 | 16801014 |
12 | a626b2b |
13 | 6678107 |
14 | 4257627 |
15 | 2b5587b |
hex | 1df38d3 |
31406291 has 8 divisors (see below), whose sum is σ = 36156000. Its totient is φ = 26722368.
The previous prime is 31406281. The next prime is 31406357. The reversal of 31406291 is 19260413.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 31406291 - 214 = 31389907 is a prime.
It is a super-2 number, since 2×314062912 = 1972710228753362, which contains 22 as substring.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 31406291.
It is not an unprimeable number, because it can be changed into a prime (31406251) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15416 + ... + 17333.
It is an arithmetic number, because the mean of its divisors is an integer number (4519500).
Almost surely, 231406291 is an apocalyptic number.
31406291 is a deficient number, since it is larger than the sum of its proper divisors (4749709).
31406291 is a wasteful number, since it uses less digits than its factorization.
31406291 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 32893.
The product of its (nonzero) digits is 1296, while the sum is 26.
The square root of 31406291 is about 5604.1316008816. The cubic root of 31406291 is about 315.5044943490.
The spelling of 31406291 in words is "thirty-one million, four hundred six thousand, two hundred ninety-one".
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