228137131 has 2 divisors, whose sum is σ = 228137132. Its totient is φ = 228137130.

The previous prime is 228137099. The next prime is 228137137. The reversal of 228137131 is 131731822.

228137131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 228137131 - 2⁵ = 228137099 is a prime.

It is a super-2 number, since 2×228137131² = 104093101081822322, which contains 22 as substring.

It is equal to p_12545722 and since 228137131 and 12545722 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228137131.

It is not a weakly prime, because it can be changed into another prime (228137137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114068565 + 114068566.

It is an arithmetic number, because the mean of its divisors is an integer number (114068566).

Almost surely, 2^228137131 is an apocalyptic number.

228137131 is a deficient number, since it is larger than the sum of its proper divisors (1).

228137131 is an equidigital number, since it uses as much as digits as its factorization.

228137131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 28.

The square root of 228137131 is about 15104.2090491359. The cubic root of 228137131 is about 611.0339278083.

Adding to 228137131 its reverse (131731822), we get a palindrome (359868953).

The spelling of 228137131 in words is "two hundred twenty-eight million, one hundred thirty-seven thousand, one hundred thirty-one".