228015923 has 2 divisors, whose sum is σ = 228015924. Its totient is φ = 228015922.

The previous prime is 228015919. The next prime is 228015929. The reversal of 228015923 is 329510822.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228015923 - 2² = 228015919 is a prime.

It is a super-2 number, since 2×228015923² = 103982522283083858, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 228015923.

It is not a weakly prime, because it can be changed into another prime (228015929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114007961 + 114007962.

It is an arithmetic number, because the mean of its divisors is an integer number (114007962).

Almost surely, 2^228015923 is an apocalyptic number.

228015923 is a deficient number, since it is larger than the sum of its proper divisors (1).

228015923 is an equidigital number, since it uses as much as digits as its factorization.

228015923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 228015923 is about 15100.1961245541. The cubic root of 228015923 is about 610.9256956526.

The spelling of 228015923 in words is "two hundred twenty-eight million, fifteen thousand, nine hundred twenty-three".