31486225 has 12 divisors (see below), whose sum is σ = 39144816. Its totient is φ = 25123280.

The previous prime is 31486201. The next prime is 31486229. The reversal of 31486225 is 52268413.

It is not a de Polignac number, because 31486225 - 2¹¹ = 31484177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31486229) 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, 9654 + ... + 12496.

It is an arithmetic number, because the mean of its divisors is an integer number (3262068).

Almost surely, 2^31486225 is an apocalyptic number.

It is an amenable number.

31486225 is a deficient number, since it is larger than the sum of its proper divisors (7658591).

31486225 is a wasteful number, since it uses less digits than its factorization.

31486225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3296 (or 3291 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 31486225 is about 5611.2587714344. The cubic root of 31486225 is about 315.7719372694.

The spelling of 31486225 in words is "thirty-one million, four hundred eighty-six thousand, two hundred twenty-five".