Search a number
-
+
30021200131 = 1313241174407
BaseRepresentation
bin11011111101011001…
…110010100100000011
32212111020011222111011
4123331121302210003
5442440411401011
621442550301351
72111644663546
oct337531624403
985436158434
1030021200131
1111806203aaa
12599a057857
132aa58a8860
14164b1a685d
15baa915621
hex6fd672903

30021200131 has 8 divisors (see below), whose sum is σ = 32333150304. Its totient is φ = 27709625280.

The previous prime is 30021200107. The next prime is 30021200197. The reversal of 30021200131 is 13100212003.

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 30021200131 - 219 = 30020675843 is a prime.

It is a super-2 number, since 2×300212001312 (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (30021200101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84930 + ... + 259336.

It is an arithmetic number, because the mean of its divisors is an integer number (4041643788).

Almost surely, 230021200131 is an apocalyptic number.

30021200131 is a deficient number, since it is larger than the sum of its proper divisors (2311950173).

30021200131 is a wasteful number, since it uses less digits than its factorization.

30021200131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187661.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 30021200131 its reverse (13100212003), we get a palindrome (43121412134).

The spelling of 30021200131 in words is "thirty billion, twenty-one million, two hundred thousand, one hundred thirty-one".

Divisors: 1 13 13241 172133 174407 2267291 2309323087 30021200131