631734331 has 16 divisors (see below), whose sum is σ = 679117824. Its totient is φ = 585535104.

The previous prime is 631734319. The next prime is 631734377. The reversal of 631734331 is 133437136.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 631734331 - 2⁷ = 631734203 is a prime.

It is a super-2 number, since 2×631734331² = 798176529928035122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 631734293 and 631734302.

It is not an unprimeable number, because it can be changed into a prime (631734431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 652810 + ... + 653776.

It is an arithmetic number, because the mean of its divisors is an integer number (42444864).

Almost surely, 2^631734331 is an apocalyptic number.

631734331 is a deficient number, since it is larger than the sum of its proper divisors (47383493).

631734331 is a wasteful number, since it uses less digits than its factorization.

631734331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1530.

The product of its digits is 13608, while the sum is 31.

The square root of 631734331 is about 25134.3257518478. The cubic root of 631734331 is about 858.0478213702.

The spelling of 631734331 in words is "six hundred thirty-one million, seven hundred thirty-four thousand, three hundred thirty-one".