64551228 has 48 divisors (see below), whose sum is σ = 175660800. Its totient is φ = 18442032.

The previous prime is 64551211. The next prime is 64551239. The reversal of 64551228 is 82215546.

It is a super-2 number, since 2×64551228² = 8333722072615968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3726 + ... + 11957.

It is an arithmetic number, because the mean of its divisors is an integer number (3659600).

Almost surely, 2^64551228 is an apocalyptic number.

It is an amenable number.

64551228 is an abundant number, since it is smaller than the sum of its proper divisors (111109572).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64551228 is a wasteful number, since it uses less digits than its factorization.

64551228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15711 (or 15695 counting only the distinct ones).

The product of its digits is 19200, while the sum is 33.

The square root of 64551228 is about 8034.3778850637. The cubic root of 64551228 is about 401.1451103442.

The spelling of 64551228 in words is "sixty-four million, five hundred fifty-one thousand, two hundred twenty-eight".