15655151 has 2 divisors, whose sum is σ = 15655152. Its totient is φ = 15655150.

The previous prime is 15655103. The next prime is 15655169. The reversal of 15655151 is 15155651.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15655151 - 2²² = 11460847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15655051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7827575 + 7827576.

It is an arithmetic number, because the mean of its divisors is an integer number (7827576).

Almost surely, 2^15655151 is an apocalyptic number.

15655151 is a deficient number, since it is larger than the sum of its proper divisors (1).

15655151 is an equidigital number, since it uses as much as digits as its factorization.

15655151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3750, while the sum is 29.

The square root of 15655151 is about 3956.6590704785. The cubic root of 15655151 is about 250.1607020107.

Subtracting from 15655151 its reverse (15155651), we obtain a triangular number (499500 = T₉₉₉).

The spelling of 15655151 in words is "fifteen million, six hundred fifty-five thousand, one hundred fifty-one".