23556221131 has 8 divisors (see below), whose sum is σ = 24318028800. Its totient is φ = 22794534120.

The previous prime is 23556221107. The next prime is 23556221137. The reversal of 23556221131 is 13112265532.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23556221131 - 2¹⁷ = 23556090059 is a prime.

It is a super-2 number, since 2×23556221131² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23556221093 and 23556221102.

It is not an unprimeable number, because it can be changed into a prime (23556221137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 534930 + ... + 577288.

It is an arithmetic number, because the mean of its divisors is an integer number (3039753600).

Almost surely, 2^23556221131 is an apocalyptic number.

23556221131 is a deficient number, since it is larger than the sum of its proper divisors (761807669).

23556221131 is a wasteful number, since it uses less digits than its factorization.

23556221131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60329.

The product of its digits is 10800, while the sum is 31.

Adding to 23556221131 its reverse (13112265532), we get a palindrome (36668486663).

The spelling of 23556221131 in words is "twenty-three billion, five hundred fifty-six million, two hundred twenty-one thousand, one hundred thirty-one".