172341374878331 has 2 divisors, whose sum is σ = 172341374878332. Its totient is φ = 172341374878330.

The previous prime is 172341374878241. The next prime is 172341374878339. The reversal of 172341374878331 is 133878473143271.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172341374878331 is a prime.

It is a super-2 number, since 2×172341374878331² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (172341374878339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86170687439165 + 86170687439166.

It is an arithmetic number, because the mean of its divisors is an integer number (86170687439166).

Almost surely, 2^{172341374878331} is an apocalyptic number.

172341374878331 is a deficient number, since it is larger than the sum of its proper divisors (1).

172341374878331 is an equidigital number, since it uses as much as digits as its factorization.

172341374878331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56899584, while the sum is 62.

The spelling of 172341374878331 in words is "one hundred seventy-two trillion, three hundred forty-one billion, three hundred seventy-four million, eight hundred seventy-eight thousand, three hundred thirty-one".