64556225 has 12 divisors (see below), whose sum is σ = 84759084. Its totient is φ = 48606720.

The previous prime is 64556213. The next prime is 64556237. The reversal of 64556225 is 52265546.

It is an interprime number because it is at equal distance from previous prime (64556213) and next prime (64556237).

It can be written as a sum of positive squares in 6 ways, for example, as 7054336 + 57501889 = 2656^2 + 7583^2 .

It is not a de Polignac number, because 64556225 - 2⁴ = 64556209 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75524 + ... + 76373.

It is an arithmetic number, because the mean of its divisors is an integer number (7063257).

Almost surely, 2^64556225 is an apocalyptic number.

It is an amenable number.

64556225 is a deficient number, since it is larger than the sum of its proper divisors (20202859).

64556225 is a wasteful number, since it uses less digits than its factorization.

64556225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151924 (or 151919 counting only the distinct ones).

The product of its digits is 72000, while the sum is 35.

The square root of 64556225 is about 8034.6888552078. The cubic root of 64556225 is about 401.1554611434.

The spelling of 64556225 in words is "sixty-four million, five hundred fifty-six thousand, two hundred twenty-five".