131642515 has 4 divisors (see below), whose sum is σ = 157971024. Its totient is φ = 105314008.

The previous prime is 131642477. The next prime is 131642531. The reversal of 131642515 is 515246131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131642515 - 2⁷ = 131642387 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13164247 + ... + 13164256.

It is an arithmetic number, because the mean of its divisors is an integer number (39492756).

Almost surely, 2^131642515 is an apocalyptic number.

131642515 is a deficient number, since it is larger than the sum of its proper divisors (26328509).

131642515 is an equidigital number, since it uses as much as digits as its factorization.

131642515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26328508.

The product of its digits is 3600, while the sum is 28.

The square root of 131642515 is about 11473.5572077713. The cubic root of 131642515 is about 508.7042784404.

Adding to 131642515 its reverse (515246131), we get a palindrome (646888646).

The spelling of 131642515 in words is "one hundred thirty-one million, six hundred forty-two thousand, five hundred fifteen".