15655091 has 2 divisors, whose sum is σ = 15655092. Its totient is φ = 15655090.

The previous prime is 15655067. The next prime is 15655103. The reversal of 15655091 is 19055651.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15655091 - 2⁶ = 15655027 is a prime.

It is not a weakly prime, because it can be changed into another prime (15655021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7827545 + 7827546.

It is an arithmetic number, because the mean of its divisors is an integer number (7827546).

Almost surely, 2^15655091 is an apocalyptic number.

15655091 is a deficient number, since it is larger than the sum of its proper divisors (1).

15655091 is an equidigital number, since it uses as much as digits as its factorization.

15655091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6750, while the sum is 32.

The square root of 15655091 is about 3956.6514883169. The cubic root of 15655091 is about 250.1603824212.

The spelling of 15655091 in words is "fifteen million, six hundred fifty-five thousand, ninety-one".