631448031 has 16 divisors (see below), whose sum is σ = 879350400. Its totient is φ = 402641568.

The previous prime is 631447997. The next prime is 631448039. The reversal of 631448031 is 130844136.

It is not a de Polignac number, because 631448031 - 2¹³ = 631439839 is a prime.

It is a super-2 number, since 2×631448031² = 797453231707553922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 631448031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631448039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41661 + ... + 54758.

It is an arithmetic number, because the mean of its divisors is an integer number (54959400).

Almost surely, 2^631448031 is an apocalyptic number.

631448031 is a deficient number, since it is larger than the sum of its proper divisors (247902369).

631448031 is a wasteful number, since it uses less digits than its factorization.

631448031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96518.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 631448031 is about 25128.6297079646. The cubic root of 631448031 is about 857.9181802646.

It can be divided in two parts, 6314 and 48031, that added together give a palindrome (54345).

The spelling of 631448031 in words is "six hundred thirty-one million, four hundred forty-eight thousand, thirty-one".