228161057 has 4 divisors (see below), whose sum is σ = 228245316. Its totient is φ = 228076800.

The previous prime is 228161051. The next prime is 228161071. The reversal of 228161057 is 750161822.

228161057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 73805281 + 154355776 = 8591^2 + 12424^2 .

It is a cyclic number.

It is not a de Polignac number, because 228161057 - 2⁶ = 228160993 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (228161051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37928 + ... + 43529.

It is an arithmetic number, because the mean of its divisors is an integer number (57061329).

Almost surely, 2^228161057 is an apocalyptic number.

It is an amenable number.

228161057 is a deficient number, since it is larger than the sum of its proper divisors (84259).

228161057 is an equidigital number, since it uses as much as digits as its factorization.

228161057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84258.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 228161057 is about 15105.0010592519. The cubic root of 228161057 is about 611.0552878951.

Subtracting from 228161057 its sum of digits (32), we obtain a square (228161025 = 15105²).

The spelling of 228161057 in words is "two hundred twenty-eight million, one hundred sixty-one thousand, fifty-seven".