172212456 has 32 divisors (see below), whose sum is σ = 463649760. Its totient is φ = 52988352.

The previous prime is 172212449. The next prime is 172212457. The reversal of 172212456 is 654212271.

It is not an unprimeable number, because it can be changed into a prime (172212457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275670 + ... + 276293.

It is an arithmetic number, because the mean of its divisors is an integer number (14489055).

Almost surely, 2^172212456 is an apocalyptic number.

It is an amenable number.

172212456 is an abundant number, since it is smaller than the sum of its proper divisors (291437304).

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

172212456 is a wasteful number, since it uses less digits than its factorization.

172212456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551985 (or 551981 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 172212456 is about 13122.9743579724. The cubic root of 172212456 is about 556.3586613290.

The spelling of 172212456 in words is "one hundred seventy-two million, two hundred twelve thousand, four hundred fifty-six".