228931577 has 32 divisors (see below), whose sum is σ = 278476800. Its totient is φ = 187971840.

The previous prime is 228931561. The next prime is 228931607. The reversal of 228931577 is 775139822.

It is not a de Polignac number, because 228931577 - 2⁴ = 228931561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228930577) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1026488 + ... + 1026710.

It is an arithmetic number, because the mean of its divisors is an integer number (8702400).

Almost surely, 2^228931577 is an apocalyptic number.

It is an amenable number.

228931577 is a deficient number, since it is larger than the sum of its proper divisors (49545223).

228931577 is an equidigital number, since it uses as much as digits as its factorization.

228931577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 344 counting only the distinct ones).

The product of its digits is 211680, while the sum is 44.

The square root of 228931577 is about 15130.4850219681. The cubic root of 228931577 is about 611.7423775427.

The spelling of 228931577 in words is "two hundred twenty-eight million, nine hundred thirty-one thousand, five hundred seventy-seven".