15305565131 has 2 divisors, whose sum is σ = 15305565132. Its totient is φ = 15305565130.

The previous prime is 15305565101. The next prime is 15305565133. The reversal of 15305565131 is 13156550351.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15305565131 is a prime.

It is a super-3 number, since 3×15305565131³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 15305565133, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 15305565091 and 15305565100.

It is not a weakly prime, because it can be changed into another prime (15305565133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7652782565 + 7652782566.

It is an arithmetic number, because the mean of its divisors is an integer number (7652782566).

Almost surely, 2^15305565131 is an apocalyptic number.

15305565131 is a deficient number, since it is larger than the sum of its proper divisors (1).

15305565131 is an equidigital number, since it uses as much as digits as its factorization.

15305565131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33750, while the sum is 35.

The spelling of 15305565131 in words is "fifteen billion, three hundred five million, five hundred sixty-five thousand, one hundred thirty-one".