631661226 has 32 divisors (see below), whose sum is σ = 1449861120. Its totient is φ = 179716656.

The previous prime is 631661203. The next prime is 631661269. The reversal of 631661226 is 622166136.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21426 + ... + 41501.

It is an arithmetic number, because the mean of its divisors is an integer number (45308160).

Almost surely, 2^631661226 is an apocalyptic number.

631661226 is an abundant number, since it is smaller than the sum of its proper divisors (818199894).

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

631661226 is a wasteful number, since it uses less digits than its factorization.

631661226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63178.

The product of its digits is 15552, while the sum is 33.

The square root of 631661226 is about 25132.8714236953. The cubic root of 631661226 is about 858.0147220104.

The spelling of 631661226 in words is "six hundred thirty-one million, six hundred sixty-one thousand, two hundred twenty-six".