11115555251 has 2 divisors, whose sum is σ = 11115555252. Its totient is φ = 11115555250.

The previous prime is 11115555229. The next prime is 11115555257. The reversal of 11115555251 is 15255551111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11115555251 - 2¹⁴ = 11115538867 is a prime.

It is not a weakly prime, because it can be changed into another prime (11115555257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5557777625 + 5557777626.

It is an arithmetic number, because the mean of its divisors is an integer number (5557777626).

Almost surely, 2^11115555251 is an apocalyptic number.

11115555251 is a deficient number, since it is larger than the sum of its proper divisors (1).

11115555251 is an equidigital number, since it uses as much as digits as its factorization.

11115555251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6250, while the sum is 32.

The spelling of 11115555251 in words is "eleven billion, one hundred fifteen million, five hundred fifty-five thousand, two hundred fifty-one".