31350725 has 24 divisors (see below), whose sum is σ = 46366080. Its totient is φ = 20560320.

The previous prime is 31350721. The next prime is 31350731. The reversal of 31350725 is 52705313.

It is not a de Polignac number, because 31350725 - 2² = 31350721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31350694 and 31350703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31350721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 131 + ... + 7919.

It is an arithmetic number, because the mean of its divisors is an integer number (1931920).

Almost surely, 2^31350725 is an apocalyptic number.

31350725 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31350725 is a deficient number, since it is larger than the sum of its proper divisors (15015355).

31350725 is a wasteful number, since it uses less digits than its factorization.

31350725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7829 (or 7824 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 26.

The square root of 31350725 is about 5599.1718137596. The cubic root of 31350725 is about 315.3183143245.

The spelling of 31350725 in words is "thirty-one million, three hundred fifty thousand, seven hundred twenty-five".