228921000231 has 32 divisors (see below), whose sum is σ = 380616155136. Its totient is φ = 118897452000.

The previous prime is 228921000221. The next prime is 228921000233. The reversal of 228921000231 is 132000129822.

It is not a de Polignac number, because 228921000231 - 2¹⁰ = 228920999207 is a prime.

It is a super-2 number, since 2×228921000231² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228921000233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1163326 + ... + 1345796.

It is an arithmetic number, because the mean of its divisors is an integer number (11894254848).

Almost surely, 2^228921000231 is an apocalyptic number.

228921000231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

228921000231 is a deficient number, since it is larger than the sum of its proper divisors (151695154905).

228921000231 is a wasteful number, since it uses less digits than its factorization.

228921000231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187923.

The product of its (nonzero) digits is 3456, while the sum is 30.

The spelling of 228921000231 in words is "two hundred twenty-eight billion, nine hundred twenty-one million, two hundred thirty-one", and thus it is an aban number.