228851811 has 24 divisors (see below), whose sum is σ = 343774704. Its totient is φ = 152137440.

The previous prime is 228851801. The next prime is 228851813. The reversal of 228851811 is 118158822.

It is not a de Polignac number, because 228851811 - 2²¹ = 226754659 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (228851813) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101185 + ... + 103421.

It is an arithmetic number, because the mean of its divisors is an integer number (14323946).

Almost surely, 2^228851811 is an apocalyptic number.

228851811 is a deficient number, since it is larger than the sum of its proper divisors (114922893).

228851811 is an equidigital number, since it uses as much as digits as its factorization.

228851811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2673 (or 2661 counting only the distinct ones).

The product of its digits is 10240, while the sum is 36.

The square root of 228851811 is about 15127.8488556701. The cubic root of 228851811 is about 611.6713200510.

The spelling of 228851811 in words is "two hundred twenty-eight million, eight hundred fifty-one thousand, eight hundred eleven".