228191255 has 16 divisors (see below), whose sum is σ = 290472480. Its totient is φ = 171497472.

The previous prime is 228191237. The next prime is 228191267. The reversal of 228191255 is 552191822.

It is a cyclic number.

It is not a de Polignac number, because 228191255 - 2¹² = 228187159 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50447 + ... + 54783.

It is an arithmetic number, because the mean of its divisors is an integer number (18154530).

Almost surely, 2^228191255 is an apocalyptic number.

228191255 is a deficient number, since it is larger than the sum of its proper divisors (62281225).

228191255 is a wasteful number, since it uses less digits than its factorization.

228191255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4978.

The product of its digits is 14400, while the sum is 35.

The square root of 228191255 is about 15106.0006288892. Note that the first 3 decimals coincide. The cubic root of 228191255 is about 611.0822452175.

The spelling of 228191255 in words is "two hundred twenty-eight million, one hundred ninety-one thousand, two hundred fifty-five".