80815131 has 8 divisors (see below), whose sum is σ = 119726160. Its totient is φ = 53876736.

The previous prime is 80815129. The next prime is 80815153. The reversal of 80815131 is 13151808.

It is not a de Polignac number, because 80815131 - 2¹ = 80815129 is a prime.

It is a super-2 number, since 2×80815131² = 13062170797094322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 2993153 = 80815131 / (8 + 0 + 8 + 1 + 5 + 1 + 3 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 80815095 and 80815104.

It is not an unprimeable number, because it can be changed into a prime (80811131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1496550 + ... + 1496603.

It is an arithmetic number, because the mean of its divisors is an integer number (14965770).

Almost surely, 2^80815131 is an apocalyptic number.

80815131 is a deficient number, since it is larger than the sum of its proper divisors (38911029).

80815131 is a wasteful number, since it uses less digits than its factorization.

80815131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2993162 (or 2993156 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 27.

The square root of 80815131 is about 8989.7236331269. The cubic root of 80815131 is about 432.3454509225.

Adding to 80815131 its reverse (13151808), we get a palindrome (93966939).

The spelling of 80815131 in words is "eighty million, eight hundred fifteen thousand, one hundred thirty-one".