131620515 has 16 divisors (see below), whose sum is σ = 226792608. Its totient is φ = 64797696.

The previous prime is 131620469. The next prime is 131620523. The reversal of 131620515 is 515026131.

It is not a de Polignac number, because 131620515 - 2⁸ = 131620259 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337294 + ... + 337683.

It is an arithmetic number, because the mean of its divisors is an integer number (14174538).

Almost surely, 2^131620515 is an apocalyptic number.

131620515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131620515 is a deficient number, since it is larger than the sum of its proper divisors (95172093).

131620515 is a wasteful number, since it uses less digits than its factorization.

131620515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674998.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 131620515 is about 11472.5984415040. The cubic root of 131620515 is about 508.6759387670.

Adding to 131620515 its reverse (515026131), we get a palindrome (646646646).

The spelling of 131620515 in words is "one hundred thirty-one million, six hundred twenty thousand, five hundred fifteen".