631131017 has 8 divisors (see below), whose sum is σ = 718441920. Its totient is φ = 548809360.

The previous prime is 631130989. The next prime is 631131023. The reversal of 631131017 is 710131136.

631131017 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 631131017 - 2⁸ = 631130761 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 631130983 and 631131001.

It is not an unprimeable number, because it can be changed into a prime (631131097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1247042 + ... + 1247547.

It is an arithmetic number, because the mean of its divisors is an integer number (89805240).

Almost surely, 2^631131017 is an apocalyptic number.

It is an amenable number.

631131017 is a deficient number, since it is larger than the sum of its proper divisors (87310903).

631131017 is a wasteful number, since it uses less digits than its factorization.

631131017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2494623.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 631131017 is about 25122.3210910139. The cubic root of 631131017 is about 857.7745856550.

The spelling of 631131017 in words is "six hundred thirty-one million, one hundred thirty-one thousand, seventeen".