1228555151 has 2 divisors, whose sum is σ = 1228555152. Its totient is φ = 1228555150.

The previous prime is 1228555117. The next prime is 1228555183. The reversal of 1228555151 is 1515558221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1228555151 - 2⁶ = 1228555087 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 (1228555351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614277575 + 614277576.

It is an arithmetic number, because the mean of its divisors is an integer number (614277576).

Almost surely, 2^1228555151 is an apocalyptic number.

1228555151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228555151 is an equidigital number, since it uses as much as digits as its factorization.

1228555151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20000, while the sum is 35.

The square root of 1228555151 is about 35050.7510761182. The cubic root of 1228555151 is about 1071.0215739177.

The spelling of 1228555151 in words is "one billion, two hundred twenty-eight million, five hundred fifty-five thousand, one hundred fifty-one".