15455591 has 2 divisors, whose sum is σ = 15455592. Its totient is φ = 15455590.

The previous prime is 15455543. The next prime is 15455593. The reversal of 15455591 is 19555451.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15455591 is a prime.

It is a Sophie Germain prime.

Together with 15455593, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15455593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7727795 + 7727796.

It is an arithmetic number, because the mean of its divisors is an integer number (7727796).

Almost surely, 2^15455591 is an apocalyptic number.

15455591 is a deficient number, since it is larger than the sum of its proper divisors (1).

15455591 is an equidigital number, since it uses as much as digits as its factorization.

15455591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22500, while the sum is 35.

The square root of 15455591 is about 3931.3599428188. The cubic root of 15455591 is about 249.0932001664.

The spelling of 15455591 in words is "fifteen million, four hundred fifty-five thousand, five hundred ninety-one".