172942409431 has 24 divisors (see below), whose sum is σ = 197253955584. Its totient is φ = 151351530000.

The previous prime is 172942409399. The next prime is 172942409441. The reversal of 172942409431 is 134904249271.

It is not a de Polignac number, because 172942409431 - 2⁵ = 172942409399 is a prime.

It is a super-2 number, since 2×172942409431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172942409441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 595746 + ... + 837136.

It is an arithmetic number, because the mean of its divisors is an integer number (8218914816).

Almost surely, 2^172942409431 is an apocalyptic number.

172942409431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

172942409431 is a deficient number, since it is larger than the sum of its proper divisors (24311546153).

172942409431 is a wasteful number, since it uses less digits than its factorization.

172942409431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241635 (or 241624 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 46.

The spelling of 172942409431 in words is "one hundred seventy-two billion, nine hundred forty-two million, four hundred nine thousand, four hundred thirty-one".