23551164731 has 4 divisors (see below), whose sum is σ = 23759582232. Its totient is φ = 23342747232.

The previous prime is 23551164653. The next prime is 23551164733. The reversal of 23551164731 is 13746115532.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23551164731 is a prime.

It is a super-2 number, since 2×23551164731² (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 (23551164733) 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, 104208581 + ... + 104208806.

It is an arithmetic number, because the mean of its divisors is an integer number (5939895558).

Almost surely, 2^23551164731 is an apocalyptic number.

23551164731 is a deficient number, since it is larger than the sum of its proper divisors (208417501).

23551164731 is a wasteful number, since it uses less digits than its factorization.

23551164731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208417500.

The product of its digits is 75600, while the sum is 38.

The spelling of 23551164731 in words is "twenty-three billion, five hundred fifty-one million, one hundred sixty-four thousand, seven hundred thirty-one".