172263258 has 12 divisors (see below), whose sum is σ = 373237098. Its totient is φ = 57421080.

The previous prime is 172263257. The next prime is 172263269. The reversal of 172263258 is 852362271.

172263258 is a `hidden beast` number, since 17 + 2 + 2 + 632 + 5 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 128663649 + 43599609 = 11343^2 + 6603^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (172263251) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4785073 + ... + 4785108.

Almost surely, 2^172263258 is an apocalyptic number.

172263258 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

172263258 is an abundant number, since it is smaller than the sum of its proper divisors (200973840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172263258 is a wasteful number, since it uses less digits than its factorization.

172263258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9570189 (or 9570186 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 172263258 is about 13124.9098282617. The cubic root of 172263258 is about 556.4133638256.

It can be divided in two parts, 1722 and 63258, that added together give a triangular number (64980 = T₃₆₀).

The spelling of 172263258 in words is "one hundred seventy-two million, two hundred sixty-three thousand, two hundred fifty-eight".