631516420220 has 48 divisors (see below), whose sum is σ = 1516437332928. Its totient is φ = 216405926400.

The previous prime is 631516420181. The next prime is 631516420229. The reversal of 631516420220 is 22024615136.

631516420220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631516420229) 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, 920297 + ... + 1452576.

It is an arithmetic number, because the mean of its divisors is an integer number (31592444436).

Almost surely, 2^631516420220 is an apocalyptic number.

It is an amenable number.

631516420220 is an abundant number, since it is smaller than the sum of its proper divisors (884920912708).

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

631516420220 is a wasteful number, since it uses less digits than its factorization.

631516420220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2374790 (or 2374788 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The spelling of 631516420220 in words is "six hundred thirty-one billion, five hundred sixteen million, four hundred twenty thousand, two hundred twenty".