172312161031 has 2 divisors, whose sum is σ = 172312161032. Its totient is φ = 172312161030.

The previous prime is 172312161013. The next prime is 172312161061. The reversal of 172312161031 is 130161213271.

172312161031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (172312161013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172312161031 - 2⁹ = 172312160519 is a prime.

It is a super-2 number, since 2×172312161031² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172312161061) 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 as a sum of consecutive naturals, namely, 86156080515 + 86156080516.

It is an arithmetic number, because the mean of its divisors is an integer number (86156080516).

Almost surely, 2^172312161031 is an apocalyptic number.

172312161031 is a deficient number, since it is larger than the sum of its proper divisors (1).

172312161031 is an equidigital number, since it uses as much as digits as its factorization.

172312161031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 28.

The spelling of 172312161031 in words is "one hundred seventy-two billion, three hundred twelve million, one hundred sixty-one thousand, thirty-one".