11215251571 has 2 divisors, whose sum is σ = 11215251572. Its totient is φ = 11215251570.

The previous prime is 11215251547. The next prime is 11215251583. The reversal of 11215251571 is 17515251211.

It is a strong prime.

It is an emirp because it is prime and its reverse (17515251211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11215251571 - 2¹¹ = 11215249523 is a prime.

It is not a weakly prime, because it can be changed into another prime (11215251521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5607625785 + 5607625786.

It is an arithmetic number, because the mean of its divisors is an integer number (5607625786).

Almost surely, 2^11215251571 is an apocalyptic number.

11215251571 is a deficient number, since it is larger than the sum of its proper divisors (1).

11215251571 is an equidigital number, since it uses as much as digits as its factorization.

11215251571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3500, while the sum is 31.

The spelling of 11215251571 in words is "eleven billion, two hundred fifteen million, two hundred fifty-one thousand, five hundred seventy-one".