631231403 has 8 divisors (see below), whose sum is σ = 729123120. Its totient is φ = 540090880.

The previous prime is 631231399. The next prime is 631231411. The reversal of 631231403 is 304132136.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 631231403 - 2² = 631231399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (631231453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1687598 + ... + 1687971.

It is an arithmetic number, because the mean of its divisors is an integer number (91140390).

Almost surely, 2^631231403 is an apocalyptic number.

631231403 is a deficient number, since it is larger than the sum of its proper divisors (97891717).

631231403 is a wasteful number, since it uses less digits than its factorization.

631231403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3375597.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 631231403 is about 25124.3189559439. The cubic root of 631231403 is about 857.8200616825.

Adding to 631231403 its reverse (304132136), we get a palindrome (935363539).

The spelling of 631231403 in words is "six hundred thirty-one million, two hundred thirty-one thousand, four hundred three".