31479225 has 36 divisors (see below), whose sum is σ = 53518896. Its totient is φ = 16326240.

The previous prime is 31479197. The next prime is 31479241. The reversal of 31479225 is 52297413.

It is not a de Polignac number, because 31479225 - 2⁸ = 31478969 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 138562 + ... + 138788.

It is an arithmetic number, because the mean of its divisors is an integer number (1486636).

Almost surely, 2^31479225 is an apocalyptic number.

It is an amenable number.

31479225 is a deficient number, since it is larger than the sum of its proper divisors (22039671).

31479225 is a wasteful number, since it uses less digits than its factorization.

31479225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326 (or 278 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 31479225 is about 5610.6349908010. The cubic root of 31479225 is about 315.7485347879.

The spelling of 31479225 in words is "thirty-one million, four hundred seventy-nine thousand, two hundred twenty-five".