228156589 has 2 divisors, whose sum is σ = 228156590. Its totient is φ = 228156588.

The previous prime is 228156587. The next prime is 228156611. The reversal of 228156589 is 985651822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221027689 + 7128900 = 14867^2 + 2670^2 .

It is a cyclic number.

It is not a de Polignac number, because 228156589 - 2¹ = 228156587 is a prime.

It is a super-2 number, since 2×228156589² = 104110858208229842, which contains 22 as substring.

Together with 228156587, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228156587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114078294 + 114078295.

It is an arithmetic number, because the mean of its divisors is an integer number (114078295).

Almost surely, 2^228156589 is an apocalyptic number.

It is an amenable number.

228156589 is a deficient number, since it is larger than the sum of its proper divisors (1).

228156589 is an equidigital number, since it uses as much as digits as its factorization.

228156589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 345600, while the sum is 46.

The square root of 228156589 is about 15104.8531604912. The cubic root of 228156589 is about 611.0512991734.

The spelling of 228156589 in words is "two hundred twenty-eight million, one hundred fifty-six thousand, five hundred eighty-nine".