15555151 has 2 divisors, whose sum is σ = 15555152. Its totient is φ = 15555150.

The previous prime is 15555143. The next prime is 15555157. The reversal of 15555151 is 15155551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15555151 - 2³ = 15555143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15555157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7777575 + 7777576.

It is an arithmetic number, because the mean of its divisors is an integer number (7777576).

Almost surely, 2^15555151 is an apocalyptic number.

15555151 is a deficient number, since it is larger than the sum of its proper divisors (1).

15555151 is an equidigital number, since it uses as much as digits as its factorization.

15555151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3125, while the sum is 28.

The square root of 15555151 is about 3944.0019016223. The cubic root of 15555151 is about 249.6269155088.

The spelling of 15555151 in words is "fifteen million, five hundred fifty-five thousand, one hundred fifty-one".