64217625 has 32 divisors (see below), whose sum is σ = 112494720. Its totient is φ = 32443200.

The previous prime is 64217623. The next prime is 64217669. The reversal of 64217625 is 52671246.

It is not a de Polignac number, because 64217625 - 2¹ = 64217623 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64217623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2619 + ... + 11631.

It is an arithmetic number, because the mean of its divisors is an integer number (3515460).

Almost surely, 2^64217625 is an apocalyptic number.

It is an amenable number.

64217625 is a deficient number, since it is larger than the sum of its proper divisors (48277095).

64217625 is a wasteful number, since it uses less digits than its factorization.

64217625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9050 (or 9040 counting only the distinct ones).

The product of its digits is 20160, while the sum is 33.

The square root of 64217625 is about 8013.5900194607. The cubic root of 64217625 is about 400.4528724894.

The spelling of 64217625 in words is "sixty-four million, two hundred seventeen thousand, six hundred twenty-five".