172306449031 has 2 divisors, whose sum is σ = 172306449032. Its totient is φ = 172306449030.

The previous prime is 172306449023. The next prime is 172306449121. The reversal of 172306449031 is 130944603271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172306449031 - 2³ = 172306449023 is a prime.

It is a super-2 number, since 2×172306449031² (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 (172306449001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86153224515 + 86153224516.

It is an arithmetic number, because the mean of its divisors is an integer number (86153224516).

Almost surely, 2^172306449031 is an apocalyptic number.

172306449031 is a deficient number, since it is larger than the sum of its proper divisors (1).

172306449031 is an equidigital number, since it uses as much as digits as its factorization.

172306449031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 40.

The spelling of 172306449031 in words is "one hundred seventy-two billion, three hundred six million, four hundred forty-nine thousand, thirty-one".