31480825 has 12 divisors (see below), whose sum is σ = 39989628. Its totient is φ = 24569600.

The previous prime is 31480793. The next prime is 31480829. The reversal of 31480825 is 52808413.

It can be written as a sum of positive squares in 6 ways, for example, as 1142761 + 30338064 = 1069^2 + 5508^2 .

It is not a de Polignac number, because 31480825 - 2⁵ = 31480793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31480829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14332 + ... + 16381.

It is an arithmetic number, because the mean of its divisors is an integer number (3332469).

Almost surely, 2^31480825 is an apocalyptic number.

It is an amenable number.

31480825 is a deficient number, since it is larger than the sum of its proper divisors (8508803).

31480825 is a wasteful number, since it uses less digits than its factorization.

31480825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30764 (or 30759 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 31480825 is about 5610.7775753455. Note that the first 3 decimals coincide. The cubic root of 31480825 is about 315.7538842324.

The spelling of 31480825 in words is "thirty-one million, four hundred eighty thousand, eight hundred twenty-five".