391076226172 has 12 divisors (see below), whose sum is σ = 684398328376. Its totient is φ = 195533846640.

The previous prime is 391076226157. The next prime is 391076226173. The reversal of 391076226172 is 271622670193.

It is a super-2 number, since 2×391076226172² (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 (391076226173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 855738 + ... + 1230625.

Almost surely, 2^391076226172 is an apocalyptic number.

It is an amenable number.

391076226172 is a deficient number, since it is larger than the sum of its proper divisors (293322102204).

391076226172 is a wasteful number, since it uses less digits than its factorization.

391076226172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2133228 (or 2133226 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 46.

The spelling of 391076226172 in words is "three hundred ninety-one billion, seventy-six million, two hundred twenty-six thousand, one hundred seventy-two".