225645587 has 4 divisors (see below), whose sum is σ = 227715840. Its totient is φ = 223575336.

The previous prime is 225645551. The next prime is 225645611. The reversal of 225645587 is 785546522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 785546522 = 2 ⋅392773261.

It is a cyclic number.

It is not a de Polignac number, because 225645587 - 2⁶ = 225645523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225645517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1034963 + ... + 1035180.

It is an arithmetic number, because the mean of its divisors is an integer number (56928960).

Almost surely, 2^225645587 is an apocalyptic number.

225645587 is a deficient number, since it is larger than the sum of its proper divisors (2070253).

225645587 is a wasteful number, since it uses less digits than its factorization.

225645587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2070252.

The product of its digits is 672000, while the sum is 44.

The square root of 225645587 is about 15021.5041523810. The cubic root of 225645587 is about 608.8013611906.

The spelling of 225645587 in words is "two hundred twenty-five million, six hundred forty-five thousand, five hundred eighty-seven".