23122540531 has 4 divisors (see below), whose sum is σ = 24482689992. Its totient is φ = 21762391072.

The previous prime is 23122540513. The next prime is 23122540547. The reversal of 23122540531 is 13504522132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23122540531 - 2¹⁵ = 23122507763 is a prime.

It is a super-2 number, since 2×23122540531² (a number of 22 digits) 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 23122540531.

It is not an unprimeable number, because it can be changed into a prime (23122540631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 680074705 + ... + 680074738.

It is an arithmetic number, because the mean of its divisors is an integer number (6120672498).

Almost surely, 2^23122540531 is an apocalyptic number.

23122540531 is a deficient number, since it is larger than the sum of its proper divisors (1360149461).

23122540531 is a wasteful number, since it uses less digits than its factorization.

23122540531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360149460.

The product of its (nonzero) digits is 7200, while the sum is 28.

The spelling of 23122540531 in words is "twenty-three billion, one hundred twenty-two million, five hundred forty thousand, five hundred thirty-one".