64510225 has 48 divisors (see below), whose sum is σ = 93882880. Its totient is φ = 43545600.

The previous prime is 64510183. The next prime is 64510241. The reversal of 64510225 is 52201546.

It is not a de Polignac number, because 64510225 - 2¹¹ = 64508177 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 64510225.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 191257 + ... + 191593.

Almost surely, 2^64510225 is an apocalyptic number.

64510225 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64510225 is a deficient number, since it is larger than the sum of its proper divisors (29372655).

64510225 is a wasteful number, since it uses less digits than its factorization.

64510225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410 (or 405 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 64510225 is about 8031.8257575722. The cubic root of 64510225 is about 401.0601564384.

The spelling of 64510225 in words is "sixty-four million, five hundred ten thousand, two hundred twenty-five".