5517115391 has 2 divisors, whose sum is σ = 5517115392. Its totient is φ = 5517115390.

The previous prime is 5517115369. The next prime is 5517115397. The reversal of 5517115391 is 1935117155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5517115391 - 2¹⁸ = 5516853247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5517115397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2758557695 + 2758557696.

It is an arithmetic number, because the mean of its divisors is an integer number (2758557696).

Almost surely, 2^5517115391 is an apocalyptic number.

5517115391 is a deficient number, since it is larger than the sum of its proper divisors (1).

5517115391 is an equidigital number, since it uses as much as digits as its factorization.

5517115391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23625, while the sum is 38.

The square root of 5517115391 is about 74277.2871812104. The cubic root of 5517115391 is about 1767.0032804931.

The spelling of 5517115391 in words is "five billion, five hundred seventeen million, one hundred fifteen thousand, three hundred ninety-one".