228137477 has 4 divisors (see below), whose sum is σ = 228961356. Its totient is φ = 227313600.

The previous prime is 228137443. The next prime is 228137521. The reversal of 228137477 is 774731822.

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 16900321 + 211237156 = 4111^2 + 14534^2 .

It is a cyclic number.

It is not a de Polignac number, because 228137477 - 2¹⁴ = 228121093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228137177) 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, 411524 + ... + 412077.

It is an arithmetic number, because the mean of its divisors is an integer number (57240339).

Almost surely, 2^228137477 is an apocalyptic number.

It is an amenable number.

228137477 is a deficient number, since it is larger than the sum of its proper divisors (823879).

228137477 is an equidigital number, since it uses as much as digits as its factorization.

228137477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823878.

The product of its digits is 131712, while the sum is 41.

The square root of 228137477 is about 15104.2205028926. The cubic root of 228137477 is about 611.0342367126.

The spelling of 228137477 in words is "two hundred twenty-eight million, one hundred thirty-seven thousand, four hundred seventy-seven".