228012131 has 2 divisors, whose sum is σ = 228012132. Its totient is φ = 228012130.

The previous prime is 228012089. The next prime is 228012137. The reversal of 228012131 is 131210822.

228012131 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 a de Polignac number, because none of the positive numbers 2^k-228012131 is a prime.

It is a super-2 number, since 2×228012131² = 103979063766322322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (228012137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114006065 + 114006066.

It is an arithmetic number, because the mean of its divisors is an integer number (114006066).

Almost surely, 2^228012131 is an apocalyptic number.

228012131 is a deficient number, since it is larger than the sum of its proper divisors (1).

228012131 is an equidigital number, since it uses as much as digits as its factorization.

228012131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 228012131 is about 15100.0705627490. The cubic root of 228012131 is about 610.9223089840.

Adding to 228012131 its reverse (131210822), we get a palindrome (359222953).

The spelling of 228012131 in words is "two hundred twenty-eight million, twelve thousand, one hundred thirty-one".