631231402 has 16 divisors (see below), whose sum is σ = 956731392. Its totient is φ = 312333840.

The previous prime is 631231399. The next prime is 631231411. The reversal of 631231402 is 204132136.

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, 103983 + ... + 109885.

It is an arithmetic number, because the mean of its divisors is an integer number (59795712).

Almost surely, 2^631231402 is an apocalyptic number.

631231402 is a deficient number, since it is larger than the sum of its proper divisors (325499990).

631231402 is a wasteful number, since it uses less digits than its factorization.

631231402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6453.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 631231402 is about 25124.3189360428. The cubic root of 631231402 is about 857.8200612295.

Adding to 631231402 its reverse (204132136), we get a palindrome (835363538).

The spelling of 631231402 in words is "six hundred thirty-one million, two hundred thirty-one thousand, four hundred two".