15255115571 has 2 divisors, whose sum is σ = 15255115572. Its totient is φ = 15255115570.

The previous prime is 15255115517. The next prime is 15255115573. The reversal of 15255115571 is 17551155251.

Together with previous prime (15255115517) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15255115571 - 2²² = 15250921267 is a prime.

Together with 15255115573, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15255115573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7627557785 + 7627557786.

It is an arithmetic number, because the mean of its divisors is an integer number (7627557786).

Almost surely, 2^15255115571 is an apocalyptic number.

15255115571 is a deficient number, since it is larger than the sum of its proper divisors (1).

15255115571 is an equidigital number, since it uses as much as digits as its factorization.

15255115571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43750, while the sum is 38.

The spelling of 15255115571 in words is "fifteen billion, two hundred fifty-five million, one hundred fifteen thousand, five hundred seventy-one".