228156587 has 2 divisors, whose sum is σ = 228156588. Its totient is φ = 228156586.

The previous prime is 228156563. The next prime is 228156589. The reversal of 228156587 is 785651822.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 228156587 - 2²² = 223962283 is a prime.

Together with 228156589, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (228156589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114078293 + 114078294.

It is an arithmetic number, because the mean of its divisors is an integer number (114078294).

Almost surely, 2^228156587 is an apocalyptic number.

228156587 is a deficient number, since it is larger than the sum of its proper divisors (1).

228156587 is an equidigital number, since it uses as much as digits as its factorization.

228156587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 268800, while the sum is 44.

The square root of 228156587 is about 15104.8530942873. The cubic root of 228156587 is about 611.0512973879.

The spelling of 228156587 in words is "two hundred twenty-eight million, one hundred fifty-six thousand, five hundred eighty-seven".