172549255631 has 2 divisors, whose sum is σ = 172549255632. Its totient is φ = 172549255630.

The previous prime is 172549255607. The next prime is 172549255633. The reversal of 172549255631 is 136552945271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172549255631 - 2¹⁰ = 172549254607 is a prime.

It is a super-2 number, since 2×172549255631² (a number of 23 digits) contains 22 as substring.

Together with 172549255633, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172549255631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172549255633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86274627815 + 86274627816.

It is an arithmetic number, because the mean of its divisors is an integer number (86274627816).

Almost surely, 2^172549255631 is an apocalyptic number.

172549255631 is a deficient number, since it is larger than the sum of its proper divisors (1).

172549255631 is an equidigital number, since it uses as much as digits as its factorization.

172549255631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268000, while the sum is 50.

The spelling of 172549255631 in words is "one hundred seventy-two billion, five hundred forty-nine million, two hundred fifty-five thousand, six hundred thirty-one".