228817651 has 2 divisors, whose sum is σ = 228817652. Its totient is φ = 228817650.

The previous prime is 228817643. The next prime is 228817717. The reversal of 228817651 is 156718822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228817651 - 2³ = 228817643 is a prime.

It is not a weakly prime, because it can be changed into another prime (228817601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114408825 + 114408826.

It is an arithmetic number, because the mean of its divisors is an integer number (114408826).

Almost surely, 2^228817651 is an apocalyptic number.

228817651 is a deficient number, since it is larger than the sum of its proper divisors (1).

228817651 is an equidigital number, since it uses as much as digits as its factorization.

228817651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 40.

The square root of 228817651 is about 15126.7197699964. The cubic root of 228817651 is about 611.6408844430.

The spelling of 228817651 in words is "two hundred twenty-eight million, eight hundred seventeen thousand, six hundred fifty-one".