31488225 has 36 divisors (see below), whose sum is σ = 54992016. Its totient is φ = 15896160.

The previous prime is 31488211. The next prime is 31488227. The reversal of 31488225 is 52288413.

It is not a de Polignac number, because 31488225 - 2⁶ = 31488161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31488227) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 26494 + ... + 27656.

It is an arithmetic number, because the mean of its divisors is an integer number (1527556).

Almost surely, 2^31488225 is an apocalyptic number.

It is an amenable number.

31488225 is a deficient number, since it is larger than the sum of its proper divisors (23503791).

31488225 is a wasteful number, since it uses less digits than its factorization.

31488225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214 (or 1190 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The square root of 31488225 is about 5611.4369817365. The cubic root of 31488225 is about 315.7786230555.

It can be divided in two parts, 31488 and 225, that added together give a palindrome (31713).

The spelling of 31488225 in words is "thirty-one million, four hundred eighty-eight thousand, two hundred twenty-five".