631370421 has 24 divisors (see below), whose sum is σ = 996525504. Its totient is φ = 382018560.

The previous prime is 631370407. The next prime is 631370423. The reversal of 631370421 is 124073136.

631370421 is a `hidden beast` number, since 631 + 3 + 7 + 0 + 4 + 21 = 666.

It is not a de Polignac number, because 631370421 - 2⁹ = 631369909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631370423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59125 + ... + 68981.

It is an arithmetic number, because the mean of its divisors is an integer number (41521896).

Almost surely, 2^631370421 is an apocalyptic number.

It is an amenable number.

631370421 is a deficient number, since it is larger than the sum of its proper divisors (365155083).

631370421 is a wasteful number, since it uses less digits than its factorization.

631370421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10521 (or 10518 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 631370421 is about 25127.0854059917. The cubic root of 631370421 is about 857.8830304952.

The spelling of 631370421 in words is "six hundred thirty-one million, three hundred seventy thousand, four hundred twenty-one".