228249551 has 2 divisors, whose sum is σ = 228249552. Its totient is φ = 228249550.

The previous prime is 228249529. The next prime is 228249557. The reversal of 228249551 is 155942822.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 228249551 - 2⁶ = 228249487 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228249557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114124775 + 114124776.

It is an arithmetic number, because the mean of its divisors is an integer number (114124776).

Almost surely, 2^228249551 is an apocalyptic number.

228249551 is a deficient number, since it is larger than the sum of its proper divisors (1).

228249551 is an equidigital number, since it uses as much as digits as its factorization.

228249551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57600, while the sum is 38.

The square root of 228249551 is about 15107.9300699997. The cubic root of 228249551 is about 611.1342784961.

The spelling of 228249551 in words is "two hundred twenty-eight million, two hundred forty-nine thousand, five hundred fifty-one".