172309845131 has 32 divisors (see below), whose sum is σ = 197037785088. Its totient is φ = 149722974720.

The previous prime is 172309845083. The next prime is 172309845133. The reversal of 172309845131 is 131548903271.

172309845131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 172309845131 - 2¹⁸ = 172309582987 is a prime.

It is a super-2 number, since 2×172309845131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172309845133) 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 31 ways as a sum of consecutive naturals, for example, 4623785 + ... + 4660901.

It is an arithmetic number, because the mean of its divisors is an integer number (6157430784).

Almost surely, 2^172309845131 is an apocalyptic number.

172309845131 is a deficient number, since it is larger than the sum of its proper divisors (24727939957).

172309845131 is a wasteful number, since it uses less digits than its factorization.

172309845131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37571.

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 172309845131 in words is "one hundred seventy-two billion, three hundred nine million, eight hundred forty-five thousand, one hundred thirty-one".