631340526 has 16 divisors (see below), whose sum is σ = 1336956624. Its totient is φ = 198067584.

The previous prime is 631340503. The next prime is 631340537. The reversal of 631340526 is 625043136.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 631340493 and 631340502.

It is a congruent number.

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, 3094705 + ... + 3094908.

It is an arithmetic number, because the mean of its divisors is an integer number (83559789).

Almost surely, 2^631340526 is an apocalyptic number.

631340526 is an abundant number, since it is smaller than the sum of its proper divisors (705616098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

631340526 is a wasteful number, since it uses less digits than its factorization.

631340526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6189635.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 631340526 is about 25126.4905229521. The cubic root of 631340526 is about 857.8694902041.

The spelling of 631340526 in words is "six hundred thirty-one million, three hundred forty thousand, five hundred twenty-six".