15215116131 has 6 divisors (see below), whose sum is σ = 21977389980. Its totient is φ = 10143410748.

The previous prime is 15215116123. The next prime is 15215116151. The reversal of 15215116131 is 13161151251.

15215116131 is a `hidden beast` number, since 1 + 521 + 5 + 1 + 1 + 6 + 131 = 666.

It is not a de Polignac number, because 15215116131 - 2³ = 15215116123 is a prime.

It is a super-2 number, since 2×15215116131² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15215116095 and 15215116104.

It is not an unprimeable number, because it can be changed into a prime (15215116151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 845284221 + ... + 845284238.

It is an arithmetic number, because the mean of its divisors is an integer number (3662898330).

Almost surely, 2^15215116131 is an apocalyptic number.

15215116131 is a deficient number, since it is larger than the sum of its proper divisors (6762273849).

15215116131 is a wasteful number, since it uses less digits than its factorization.

15215116131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1690568465 (or 1690568462 counting only the distinct ones).

The product of its digits is 900, while the sum is 27.

Adding to 15215116131 its reverse (13161151251), we get a palindrome (28376267382).

The spelling of 15215116131 in words is "fifteen billion, two hundred fifteen million, one hundred sixteen thousand, one hundred thirty-one".