23101215731 has 16 divisors (see below), whose sum is σ = 26928586080. Its totient is φ = 19584391680.

The previous prime is 23101215707. The next prime is 23101215749. The reversal of 23101215731 is 13751210132.

It is not a de Polignac number, because 23101215731 - 2⁶ = 23101215667 is a prime.

It is a super-2 number, since 2×23101215731² (a number of 22 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 23101215731.

It is not an unprimeable number, because it can be changed into a prime (23101217731) 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, 546296 + ... + 587061.

It is an arithmetic number, because the mean of its divisors is an integer number (1683036630).

Almost surely, 2^23101215731 is an apocalyptic number.

23101215731 is a deficient number, since it is larger than the sum of its proper divisors (3827370349).

23101215731 is a wasteful number, since it uses less digits than its factorization.

23101215731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133494.

The product of its (nonzero) digits is 1260, while the sum is 26.

Adding to 23101215731 its reverse (13751210132), we get a palindrome (36852425863).

It can be divided in two parts, 23101 and 215731, that added together give a palindrome (238832).

The spelling of 23101215731 in words is "twenty-three billion, one hundred one million, two hundred fifteen thousand, seven hundred thirty-one".