23243666531 has 4 divisors (see below), whose sum is σ = 24254260752. Its totient is φ = 22233072312.

The previous prime is 23243666497. The next prime is 23243666581. The reversal of 23243666531 is 13566634232.

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 23243666531 - 2¹⁰ = 23243665507 is a prime.

It is a super-2 number, since 2×23243666531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23243666581) 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, 505297076 + ... + 505297121.

It is an arithmetic number, because the mean of its divisors is an integer number (6063565188).

Almost surely, 2^23243666531 is an apocalyptic number.

23243666531 is a deficient number, since it is larger than the sum of its proper divisors (1010594221).

23243666531 is a wasteful number, since it uses less digits than its factorization.

23243666531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010594220.

The product of its digits is 466560, while the sum is 41.

The spelling of 23243666531 in words is "twenty-three billion, two hundred forty-three million, six hundred sixty-six thousand, five hundred thirty-one".