228308651 has 2 divisors, whose sum is σ = 228308652. Its totient is φ = 228308650.

The previous prime is 228308627. The next prime is 228308653. The reversal of 228308651 is 156803822.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228308651 is a prime.

It is a Sophie Germain prime.

Together with 228308653, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (228308653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114154325 + 114154326.

It is an arithmetic number, because the mean of its divisors is an integer number (114154326).

Almost surely, 2^228308651 is an apocalyptic number.

228308651 is a deficient number, since it is larger than the sum of its proper divisors (1).

228308651 is an equidigital number, since it uses as much as digits as its factorization.

228308651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 228308651 is about 15109.8858698536. The cubic root of 228308651 is about 611.1870203581.

The spelling of 228308651 in words is "two hundred twenty-eight million, three hundred eight thousand, six hundred fifty-one".