228272131 has 2 divisors, whose sum is σ = 228272132. Its totient is φ = 228272130.

The previous prime is 228272119. The next prime is 228272147. The reversal of 228272131 is 131272822.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228272131 is a prime.

It is a super-2 number, since 2×228272131² = 104216331582562322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 228272131.

It is not a weakly prime, because it can be changed into another prime (228272531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114136065 + 114136066.

It is an arithmetic number, because the mean of its divisors is an integer number (114136066).

Almost surely, 2^228272131 is an apocalyptic number.

228272131 is a deficient number, since it is larger than the sum of its proper divisors (1).

228272131 is an equidigital number, since it uses as much as digits as its factorization.

228272131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 28.

The square root of 228272131 is about 15108.6773411838. The cubic root of 228272131 is about 611.1544303531.

The spelling of 228272131 in words is "two hundred twenty-eight million, two hundred seventy-two thousand, one hundred thirty-one".