228512939 has 2 divisors, whose sum is σ = 228512940. Its totient is φ = 228512938.

The previous prime is 228512927. The next prime is 228512983. The reversal of 228512939 is 939215822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228512939 - 2⁴ = 228512923 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 228512896 and 228512905.

It is not a weakly prime, because it can be changed into another prime (228512989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114256469 + 114256470.

It is an arithmetic number, because the mean of its divisors is an integer number (114256470).

Almost surely, 2^228512939 is an apocalyptic number.

228512939 is a deficient number, since it is larger than the sum of its proper divisors (1).

228512939 is an equidigital number, since it uses as much as digits as its factorization.

228512939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The square root of 228512939 is about 15116.6444358528. The cubic root of 228512939 is about 611.3692604257.

The spelling of 228512939 in words is "two hundred twenty-eight million, five hundred twelve thousand, nine hundred thirty-nine".