631211245 has 16 divisors (see below), whose sum is σ = 895512960. Its totient is φ = 417904704.

The previous prime is 631211237. The next prime is 631211263. The reversal of 631211245 is 542112136.

It is a happy number.

It is not a de Polignac number, because 631211245 - 2³ = 631211237 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 309927 + ... + 311956.

It is an arithmetic number, because the mean of its divisors is an integer number (55969560).

Almost surely, 2^631211245 is an apocalyptic number.

It is an amenable number.

631211245 is a deficient number, since it is larger than the sum of its proper divisors (264301715).

631211245 is a wasteful number, since it uses less digits than its factorization.

631211245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621924.

The product of its digits is 1440, while the sum is 25.

The square root of 631211245 is about 25123.9177876381. The cubic root of 631211245 is about 857.8109302606.

The spelling of 631211245 in words is "six hundred thirty-one million, two hundred eleven thousand, two hundred forty-five".