631217970 has 96 divisors (see below), whose sum is σ = 1703130624. Its totient is φ = 162028800.

The previous prime is 631217963. The next prime is 631217971. The reversal of 631217970 is 79712136.

It is a happy number.

631217970 is a `hidden beast` number, since 631 + 2 + 17 + 9 + 7 + 0 = 666.

631217970 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×631217970² = 796872251301841800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (631217971) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 649585 + ... + 650555.

It is an arithmetic number, because the mean of its divisors is an integer number (17740944).

Almost surely, 2^631217970 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631217970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (851565312).

631217970 is an abundant number, since it is smaller than the sum of its proper divisors (1071912654).

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

631217970 is a wasteful number, since it uses less digits than its factorization.

631217970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248 (or 1245 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 631217970 is about 25124.0516238922. The cubic root of 631217970 is about 857.8139766565.

The spelling of 631217970 in words is "six hundred thirty-one million, two hundred seventeen thousand, nine hundred seventy".