631313085 has 32 divisors (see below), whose sum is σ = 1135104768. Its totient is φ = 297285120.

The previous prime is 631313083. The next prime is 631313099. The reversal of 631313085 is 580313136.

It is not a de Polignac number, because 631313085 - 2¹ = 631313083 is a prime.

It is a super-2 number, since 2×631313085² = 797112422584434450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631313083) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65896 + ... + 74865.

It is an arithmetic number, because the mean of its divisors is an integer number (35472024).

Almost surely, 2^631313085 is an apocalyptic number.

631313085 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

631313085 is a deficient number, since it is larger than the sum of its proper divisors (503791683).

631313085 is a wasteful number, since it uses less digits than its factorization.

631313085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140805.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 631313085 is about 25125.9444598606. The cubic root of 631313085 is about 857.8570610227.

The spelling of 631313085 in words is "six hundred thirty-one million, three hundred thirteen thousand, eighty-five".