23311023531 has 32 divisors (see below), whose sum is σ = 33259603968. Its totient is φ = 14495915520.

The previous prime is 23311023521. The next prime is 23311023539. The reversal of 23311023531 is 13532011332.

It is not a de Polignac number, because 23311023531 - 2⁷ = 23311023403 is a prime.

It is a super-2 number, since 2×23311023531² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23311023539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 336531 + ... + 399843.

It is an arithmetic number, because the mean of its divisors is an integer number (1039362624).

Almost surely, 2^23311023531 is an apocalyptic number.

23311023531 is a deficient number, since it is larger than the sum of its proper divisors (9948580437).

23311023531 is a wasteful number, since it uses less digits than its factorization.

23311023531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63491.

The product of its (nonzero) digits is 1620, while the sum is 24.

Adding to 23311023531 its reverse (13532011332), we get a palindrome (36843034863).

The spelling of 23311023531 in words is "twenty-three billion, three hundred eleven million, twenty-three thousand, five hundred thirty-one".