631225400 has 48 divisors (see below), whose sum is σ = 1580497800. Its totient is φ = 233066880.

The previous prime is 631225367. The next prime is 631225403. The reversal of 631225400 is 4522136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631225403) 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 11 ways as a sum of consecutive naturals, for example, 118790 + ... + 123989.

Almost surely, 2^631225400 is an apocalyptic number.

It is an amenable number.

631225400 is an abundant number, since it is smaller than the sum of its proper divisors (949272400).

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

631225400 is a wasteful number, since it uses less digits than its factorization.

631225400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242808 (or 242799 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 631225400 is about 25124.1994897350. The cubic root of 631225400 is about 857.8173423891.

Adding to 631225400 its reverse (4522136), we get a palindrome (635747536).

The spelling of 631225400 in words is "six hundred thirty-one million, two hundred twenty-five thousand, four hundred".