172111232131 has 16 divisors (see below), whose sum is σ = 175065408000. Its totient is φ = 169172539200.

The previous prime is 172111232107. The next prime is 172111232143. The reversal of 172111232131 is 131232111271.

It is a cyclic number.

It is not a de Polignac number, because 172111232131 - 2⁹ = 172111231619 is a prime.

It is a super-2 number, since 2×172111232131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172111232096 and 172111232105.

It is not an unprimeable number, because it can be changed into a prime (172111032131) 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, 48768775 + ... + 48772303.

It is an arithmetic number, because the mean of its divisors is an integer number (10941588000).

Almost surely, 2^172111232131 is an apocalyptic number.

172111232131 is a deficient number, since it is larger than the sum of its proper divisors (2954175869).

172111232131 is a wasteful number, since it uses less digits than its factorization.

172111232131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5490.

The product of its digits is 504, while the sum is 25.

The spelling of 172111232131 in words is "one hundred seventy-two billion, one hundred eleven million, two hundred thirty-two thousand, one hundred thirty-one".