391552322312 has 12 divisors (see below), whose sum is σ = 734163922845. Its totient is φ = 195775276224.

The previous prime is 391552322279. The next prime is 391552322377. The reversal of 391552322312 is 213223255193.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 272081164996 + 119471157316 = 521614^2 + 345646^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=442466.

It is a super-2 number, since 2×391552322312² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1659248 + ... + 1880480.

Almost surely, 2^391552322312 is an apocalyptic number.

It is an amenable number.

391552322312 is a deficient number, since it is larger than the sum of its proper divisors (342611600533).

391552322312 is an frugal number, since it uses more digits than its factorization.

391552322312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442472 (or 221235 counting only the distinct ones).

The product of its digits is 97200, while the sum is 38.

The spelling of 391552322312 in words is "three hundred ninety-one billion, five hundred fifty-two million, three hundred twenty-two thousand, three hundred twelve".