228695237 has 8 divisors (see below), whose sum is σ = 242991000. Its totient is φ = 215237952.

The previous prime is 228695179. The next prime is 228695281. The reversal of 228695237 is 732596822.

228695237 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 106791556 + 121903681 = 10334^2 + 11041^2 .

It is not a de Polignac number, because 228695237 - 2¹⁶ = 228629701 is a prime.

It is a super-2 number, since 2×228695237² = 104603022852972338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228695287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18362 + ... + 28187.

It is an arithmetic number, because the mean of its divisors is an integer number (30373875).

Almost surely, 2^228695237 is an apocalyptic number.

It is an amenable number.

228695237 is a deficient number, since it is larger than the sum of its proper divisors (14295763).

228695237 is an frugal number, since it uses more digits than its factorization.

228695237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46600 (or 46566 counting only the distinct ones).

The product of its digits is 362880, while the sum is 44.

The square root of 228695237 is about 15122.6729449526. The cubic root of 228695237 is about 611.5317920967.

The spelling of 228695237 in words is "two hundred twenty-eight million, six hundred ninety-five thousand, two hundred thirty-seven".