64613225 has 6 divisors (see below), whose sum is σ = 80120430. Its totient is φ = 51690560.

The previous prime is 64613221. The next prime is 64613257. The reversal of 64613225 is 52231646.

It can be written as a sum of positive squares in 3 ways, for example, as 2849344 + 61763881 = 1688^2 + 7859^2 .

It is not a de Polignac number, because 64613225 - 2² = 64613221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64613221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1292240 + ... + 1292289.

It is an arithmetic number, because the mean of its divisors is an integer number (13353405).

Almost surely, 2^64613225 is an apocalyptic number.

It is an amenable number.

64613225 is a deficient number, since it is larger than the sum of its proper divisors (15507205).

64613225 is a wasteful number, since it uses less digits than its factorization.

64613225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2584539 (or 2584534 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 64613225 is about 8038.2351918814. The cubic root of 64613225 is about 401.2734933175.

The spelling of 64613225 in words is "sixty-four million, six hundred thirteen thousand, two hundred twenty-five".