228561516 has 36 divisors (see below), whose sum is σ = 587550600. Its totient is φ = 74895168.

The previous prime is 228561503. The next prime is 228561521. The reversal of 228561516 is 615165822.

228561516 is a `hidden beast` number, since 2 + 2 + 85 + 61 + 516 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51681 + ... + 55928.

It is an arithmetic number, because the mean of its divisors is an integer number (16320850).

Almost surely, 2^228561516 is an apocalyptic number.

It is an amenable number.

228561516 is an abundant number, since it is smaller than the sum of its proper divisors (358989084).

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

228561516 is a wasteful number, since it uses less digits than its factorization.

228561516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107678 (or 107673 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 228561516 is about 15118.2510893291. The cubic root of 228561516 is about 611.4125787319.

The spelling of 228561516 in words is "two hundred twenty-eight million, five hundred sixty-one thousand, five hundred sixteen".