21313000131 has 16 divisors (see below), whose sum is σ = 30944467200. Its totient is φ = 12996674208.

The previous prime is 21313000127. The next prime is 21313000151. The reversal of 21313000131 is 13100031312.

It is not a de Polignac number, because 21313000131 - 2² = 21313000127 is a prime.

It is a super-2 number, since 2×21313000131² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21313000131.

It is not an unprimeable number, because it can be changed into a prime (21313000151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6445111 + ... + 6448416.

It is an arithmetic number, because the mean of its divisors is an integer number (1934029200).

Almost surely, 2^21313000131 is an apocalyptic number.

21313000131 is a deficient number, since it is larger than the sum of its proper divisors (9631467069).

21313000131 is a wasteful number, since it uses less digits than its factorization.

21313000131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12893578.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 21313000131 its reverse (13100031312), we get a palindrome (34413031443).

The spelling of 21313000131 in words is "twenty-one billion, three hundred thirteen million, one hundred thirty-one", and thus it is an aban number.