631147812 has 24 divisors (see below), whose sum is σ = 1480159296. Its totient is φ = 209313888.

The previous prime is 631147799. The next prime is 631147901. The reversal of 631147812 is 218741136.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131128 + ... + 135855.

It is an arithmetic number, because the mean of its divisors is an integer number (61673304).

Almost surely, 2^631147812 is an apocalyptic number.

It is an amenable number.

631147812 is an abundant number, since it is smaller than the sum of its proper divisors (849011484).

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

631147812 is a wasteful number, since it uses less digits than its factorization.

631147812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267187 (or 267185 counting only the distinct ones).

The product of its digits is 8064, while the sum is 33.

The square root of 631147812 is about 25122.6553532862. The cubic root of 631147812 is about 857.7821943215.

Adding to 631147812 its reverse (218741136), we get a palindrome (849888948).

The spelling of 631147812 in words is "six hundred thirty-one million, one hundred forty-seven thousand, eight hundred twelve".