64145225 has 6 divisors (see below), whose sum is σ = 79540110. Its totient is φ = 51316160.

The previous prime is 64145219. The next prime is 64145239. The reversal of 64145225 is 52254146.

It can be written as a sum of positive squares in 3 ways, for example, as 17161 + 64128064 = 131^2 + 8008^2 .

It is a de Polignac number, because none of the positive numbers 2^k-64145225 is a prime.

It is a super-2 number, since 2×64145225² = 8229219780601250, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1282880 + ... + 1282929.

It is an arithmetic number, because the mean of its divisors is an integer number (13256685).

Almost surely, 2^64145225 is an apocalyptic number.

It is an amenable number.

64145225 is a deficient number, since it is larger than the sum of its proper divisors (15394885).

64145225 is a wasteful number, since it uses less digits than its factorization.

64145225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2565819 (or 2565814 counting only the distinct ones).

The product of its digits is 9600, while the sum is 29.

The square root of 64145225 is about 8009.0714193345. The cubic root of 64145225 is about 400.3023235270.

The spelling of 64145225 in words is "sixty-four million, one hundred forty-five thousand, two hundred twenty-five".