631017725 has 24 divisors (see below), whose sum is σ = 855257760. Its totient is φ = 459011520.

The previous prime is 631017691. The next prime is 631017731. The reversal of 631017725 is 527710136.

It is not a de Polignac number, because 631017725 - 2⁸ = 631017469 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 631017691 and 631017700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7286 + ... + 36264.

It is an arithmetic number, because the mean of its divisors is an integer number (35635740).

Almost surely, 2^631017725 is an apocalyptic number.

631017725 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

631017725 is a deficient number, since it is larger than the sum of its proper divisors (224240035).

631017725 is a wasteful number, since it uses less digits than its factorization.

631017725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29069 (or 29064 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 631017725 is about 25120.0661822377. The cubic root of 631017725 is about 857.7232572667.

The spelling of 631017725 in words is "six hundred thirty-one million, seventeen thousand, seven hundred twenty-five".