64623225 has 24 divisors (see below), whose sum is σ = 107132032. Its totient is φ = 34372800.

The previous prime is 64623197. The next prime is 64623259. The reversal of 64623225 is 52232646.

It is not a de Polignac number, because 64623225 - 2⁸ = 64622969 is a prime.

It is a super-2 number, since 2×64623225² = 8352322418801250, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64623192 and 64623201.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33795 + ... + 35655.

Almost surely, 2^64623225 is an apocalyptic number.

It is an amenable number.

64623225 is a deficient number, since it is larger than the sum of its proper divisors (42508807).

64623225 is a wasteful number, since it uses less digits than its factorization.

64623225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2337 (or 2332 counting only the distinct ones).

The product of its digits is 17280, while the sum is 30.

The square root of 64623225 is about 8038.8571949003. The cubic root of 64623225 is about 401.2941935582.

It can be divided in two parts, 646 and 23225, that added together give a triangular number (23871 = T₂₁₈).

The spelling of 64623225 in words is "sixty-four million, six hundred twenty-three thousand, two hundred twenty-five".