131302515 has 32 divisors (see below), whose sum is σ = 226308096. Its totient is φ = 64817280.

The previous prime is 131302511. The next prime is 131302547. The reversal of 131302515 is 515203131.

It is not a de Polignac number, because 131302515 - 2² = 131302511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131302491 and 131302500.

It is not an unprimeable number, because it can be changed into a prime (131302511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4557 + ... + 16833.

It is an arithmetic number, because the mean of its divisors is an integer number (7072128).

Almost surely, 2^131302515 is an apocalyptic number.

131302515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131302515 is a deficient number, since it is larger than the sum of its proper divisors (95005581).

131302515 is a wasteful number, since it uses less digits than its factorization.

131302515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12339.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 131302515 is about 11458.7309506769. The cubic root of 131302515 is about 508.2659484867.

Adding to 131302515 its reverse (515203131), we get a palindrome (646505646).

The spelling of 131302515 in words is "one hundred thirty-one million, three hundred two thousand, five hundred fifteen".