31461625 has 32 divisors (see below), whose sum is σ = 44553600. Its totient is φ = 21988800.

The previous prime is 31461571. The next prime is 31461641. The reversal of 31461625 is 52616413.

It is not a de Polignac number, because 31461625 - 2⁹ = 31461113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31461593 and 31461602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30366 + ... + 31384.

It is an arithmetic number, because the mean of its divisors is an integer number (1392300).

Almost surely, 2^31461625 is an apocalyptic number.

It is an amenable number.

31461625 is a deficient number, since it is larger than the sum of its proper divisors (13091975).

31461625 is a wasteful number, since it uses less digits than its factorization.

31461625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066 (or 1056 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 31461625 is about 5609.0663215904. The cubic root of 31461625 is about 315.6896789319.

The spelling of 31461625 in words is "thirty-one million, four hundred sixty-one thousand, six hundred twenty-five".