631982421 has 24 divisors (see below), whose sum is σ = 1044126720. Its totient is φ = 360837216.

The previous prime is 631982411. The next prime is 631982473. The reversal of 631982421 is 124289136.

631982421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 631982421 - 2⁶ = 631982357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631982411) 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, 90700 + ... + 97418.

It is an arithmetic number, because the mean of its divisors is an integer number (43505280).

Almost surely, 2^631982421 is an apocalyptic number.

It is an amenable number.

631982421 is a deficient number, since it is larger than the sum of its proper divisors (412144299).

631982421 is a wasteful number, since it uses less digits than its factorization.

631982421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8225 (or 8222 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 631982421 is about 25139.2605499844. The cubic root of 631982421 is about 858.1601287192.

The spelling of 631982421 in words is "six hundred thirty-one million, nine hundred eighty-two thousand, four hundred twenty-one".