228998131 has 2 divisors, whose sum is σ = 228998132. Its totient is φ = 228998130.

The previous prime is 228998129. The next prime is 228998137. The reversal of 228998131 is 131899822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228998131 - 2¹ = 228998129 is a prime.

It is a super-2 number, since 2×228998131² = 104880288002986322, which contains 22 as substring.

Together with 228998129, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (228998137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114499065 + 114499066.

It is an arithmetic number, because the mean of its divisors is an integer number (114499066).

Almost surely, 2^228998131 is an apocalyptic number.

228998131 is a deficient number, since it is larger than the sum of its proper divisors (1).

228998131 is an equidigital number, since it uses as much as digits as its factorization.

228998131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 43.

The square root of 228998131 is about 15132.6841967973. The cubic root of 228998131 is about 611.8016528335.

The spelling of 228998131 in words is "two hundred twenty-eight million, nine hundred ninety-eight thousand, one hundred thirty-one".