15318488291 has 2 divisors, whose sum is σ = 15318488292. Its totient is φ = 15318488290.

The previous prime is 15318488071. The next prime is 15318488501. The reversal of 15318488291 is 19288481351.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15318488291 is a prime.

It is a Sophie Germain prime.

It is a lonely number, since its distance to closest prime (15318488501) sets a new record.

It is not a weakly prime, because it can be changed into another prime (15318488891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7659244145 + 7659244146.

It is an arithmetic number, because the mean of its divisors is an integer number (7659244146).

Almost surely, 2^15318488291 is an apocalyptic number.

15318488291 is a deficient number, since it is larger than the sum of its proper divisors (1).

15318488291 is an equidigital number, since it uses as much as digits as its factorization.

15318488291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 552960, while the sum is 50.

The spelling of 15318488291 in words is "fifteen billion, three hundred eighteen million, four hundred eighty-eight thousand, two hundred ninety-one".