255172439223 has 48 divisors (see below), whose sum is σ = 409688173440. Its totient is φ = 152063410752.

The previous prime is 255172439173. The next prime is 255172439261. The reversal of 255172439223 is 322934271552.

255172439223 is a `hidden beast` number, since 2 + 5 + 517 + 2 + 43 + 92 + 2 + 3 = 666.

It is not a de Polignac number, because 255172439223 - 2¹² = 255172435127 is a prime.

It is a super-2 number, since 2×255172439223² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255172435223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 186640 + ... + 738362.

It is an arithmetic number, because the mean of its divisors is an integer number (8535170280).

Almost surely, 2^255172439223 is an apocalyptic number.

255172439223 is a deficient number, since it is larger than the sum of its proper divisors (154515734217).

255172439223 is a wasteful number, since it uses less digits than its factorization.

255172439223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551868 (or 551865 counting only the distinct ones).

The product of its digits is 907200, while the sum is 45.

The spelling of 255172439223 in words is "two hundred fifty-five billion, one hundred seventy-two million, four hundred thirty-nine thousand, two hundred twenty-three".