31465225 has 12 divisors (see below), whose sum is σ = 42564240. Its totient is φ = 22883600.

The previous prime is 31465223. The next prime is 31465243. The reversal of 31465225 is 52256413.

It is not a de Polignac number, because 31465225 - 2¹ = 31465223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31465193 and 31465202.

It is not an unprimeable number, because it can be changed into a prime (31465223) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 56935 + ... + 57484.

It is an arithmetic number, because the mean of its divisors is an integer number (3547020).

Almost surely, 2^31465225 is an apocalyptic number.

It is an amenable number.

31465225 is a deficient number, since it is larger than the sum of its proper divisors (11099015).

31465225 is a wasteful number, since it uses less digits than its factorization.

31465225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114440 (or 114435 counting only the distinct ones).

The product of its digits is 7200, while the sum is 28.

The square root of 31465225 is about 5609.3872214352. The cubic root of 31465225 is about 315.7017194151.

The spelling of 31465225 in words is "thirty-one million, four hundred sixty-five thousand, two hundred twenty-five".