228737961 has 6 divisors (see below), whose sum is σ = 330399290. Its totient is φ = 152491968.

The previous prime is 228737953. The next prime is 228738011. The reversal of 228737961 is 169737822.

It can be written as a sum of positive squares in only one way, i.e., 220700736 + 8037225 = 14856^2 + 2835^2 .

It is not a de Polignac number, because 228737961 - 2³ = 228737953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228737911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12707656 + ... + 12707673.

Almost surely, 2^228737961 is an apocalyptic number.

It is an amenable number.

228737961 is a deficient number, since it is larger than the sum of its proper divisors (101661329).

228737961 is a wasteful number, since it uses less digits than its factorization.

228737961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25415335 (or 25415332 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 228737961 is about 15124.0854599543. The cubic root of 228737961 is about 611.5698710962.

The spelling of 228737961 in words is "two hundred twenty-eight million, seven hundred thirty-seven thousand, nine hundred sixty-one".