172391214 has 32 divisors (see below), whose sum is σ = 362355840. Its totient is φ = 54607392.

The previous prime is 172391207. The next prime is 172391221. The reversal of 172391214 is 412193271.

It is an interprime number because it is at equal distance from previous prime (172391207) and next prime (172391221).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 517 + ... + 18575.

It is an arithmetic number, because the mean of its divisors is an integer number (11323620).

Almost surely, 2^172391214 is an apocalyptic number.

172391214 is an abundant number, since it is smaller than the sum of its proper divisors (189964626).

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

172391214 is a wasteful number, since it uses less digits than its factorization.

172391214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18144.

The product of its digits is 3024, while the sum is 30.

The square root of 172391214 is about 13129.7834711773. The cubic root of 172391214 is about 556.5510964418.

The spelling of 172391214 in words is "one hundred seventy-two million, three hundred ninety-one thousand, two hundred fourteen".