228937131 has 8 divisors (see below), whose sum is σ = 339166160. Its totient is φ = 152624736.

The previous prime is 228937123. The next prime is 228937171. The reversal of 228937131 is 131739822.

228937131 is a `hidden beast` number, since 2 + 289 + 371 + 3 + 1 = 666.

It is not a de Polignac number, because 228937131 - 2³ = 228937123 is a prime.

It is a super-2 number, since 2×228937131² = 104824419901022322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228937171) 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, 4239550 + ... + 4239603.

It is an arithmetic number, because the mean of its divisors is an integer number (42395770).

Almost surely, 2^228937131 is an apocalyptic number.

228937131 is a deficient number, since it is larger than the sum of its proper divisors (110229029).

228937131 is an equidigital number, since it uses as much as digits as its factorization.

228937131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8479162 (or 8479156 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 228937131 is about 15130.6685576018. The cubic root of 228937131 is about 611.7473245662.

The spelling of 228937131 in words is "two hundred twenty-eight million, nine hundred thirty-seven thousand, one hundred thirty-one".