172340756431 has 2 divisors, whose sum is σ = 172340756432. Its totient is φ = 172340756430.

The previous prime is 172340756417. The next prime is 172340756443. The reversal of 172340756431 is 134657043271.

It is a strong prime.

It is an emirp because it is prime and its reverse (134657043271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172340756431 - 2²¹ = 172338659279 is a prime.

It is a super-2 number, since 2×172340756431² (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 (172340756411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86170378215 + 86170378216.

It is an arithmetic number, because the mean of its divisors is an integer number (86170378216).

Almost surely, 2^172340756431 is an apocalyptic number.

172340756431 is a deficient number, since it is larger than the sum of its proper divisors (1).

172340756431 is an equidigital number, since it uses as much as digits as its factorization.

172340756431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 423360, while the sum is 43.

The spelling of 172340756431 in words is "one hundred seventy-two billion, three hundred forty million, seven hundred fifty-six thousand, four hundred thirty-one".