631072220 has 24 divisors (see below), whose sum is σ = 1329020784. Its totient is φ = 251710976.

The previous prime is 631072207. The next prime is 631072223. The reversal of 631072220 is 22270136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631072223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37634 + ... + 51753.

It is an arithmetic number, because the mean of its divisors is an integer number (55375866).

Almost surely, 2^631072220 is an apocalyptic number.

It is an amenable number.

631072220 is an abundant number, since it is smaller than the sum of its proper divisors (697948564).

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

631072220 is a wasteful number, since it uses less digits than its factorization.

631072220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89749 (or 89747 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 631072220 is about 25121.1508494336. The cubic root of 631072220 is about 857.7479476896.

The spelling of 631072220 in words is "six hundred thirty-one million, seventy-two thousand, two hundred twenty".