23261132212531 has 32 divisors (see below), whose sum is σ = 25232299503680. Its totient is φ = 21374793216000.

The previous prime is 23261132212523. The next prime is 23261132212543. The reversal of 23261132212531 is 13521223116232.

It is a cyclic number.

It is not a de Polignac number, because 23261132212531 - 2³ = 23261132212523 is a prime.

It is a super-4 number, since 4×23261132212531⁴ (a number of 55 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23261132212231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 533086891 + ... + 533130523.

It is an arithmetic number, because the mean of its divisors is an integer number (788509359490).

Almost surely, 2^{23261132212531} is an apocalyptic number.

23261132212531 is a deficient number, since it is larger than the sum of its proper divisors (1971167291149).

23261132212531 is a wasteful number, since it uses less digits than its factorization.

23261132212531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50087.

The product of its digits is 25920, while the sum is 34.

Adding to 23261132212531 its reverse (13521223116232), we get a palindrome (36782355328763).

The spelling of 23261132212531 in words is "twenty-three trillion, two hundred sixty-one billion, one hundred thirty-two million, two hundred twelve thousand, five hundred thirty-one".