631912491231 has 8 divisors (see below), whose sum is σ = 962914272384. Its totient is φ = 361092852120.

The previous prime is 631912491209. The next prime is 631912491251. The reversal of 631912491231 is 132194219136.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 631912491231 - 2¹³ = 631912483039 is a prime.

It is a super-2 number, since 2×631912491231² (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 (631912491251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15045535485 + ... + 15045535526.

It is an arithmetic number, because the mean of its divisors is an integer number (120364284048).

Almost surely, 2^631912491231 is an apocalyptic number.

631912491231 is a deficient number, since it is larger than the sum of its proper divisors (331001781153).

631912491231 is a wasteful number, since it uses less digits than its factorization.

631912491231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30091071021.

The product of its digits is 69984, while the sum is 42.

The spelling of 631912491231 in words is "six hundred thirty-one billion, nine hundred twelve million, four hundred ninety-one thousand, two hundred thirty-one".