131772515 has 12 divisors (see below), whose sum is σ = 183944016. Its totient is φ = 90358128.

The previous prime is 131772499. The next prime is 131772527. The reversal of 131772515 is 515277131.

It is not a de Polignac number, because 131772515 - 2⁴ = 131772499 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 268679 + ... + 269168.

It is an arithmetic number, because the mean of its divisors is an integer number (15328668).

Almost surely, 2^131772515 is an apocalyptic number.

131772515 is a deficient number, since it is larger than the sum of its proper divisors (52171501).

131772515 is an equidigital number, since it uses as much as digits as its factorization.

131772515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537866 (or 537859 counting only the distinct ones).

The product of its digits is 7350, while the sum is 32.

The square root of 131772515 is about 11479.2210101557. The cubic root of 131772515 is about 508.8716757267.

The spelling of 131772515 in words is "one hundred thirty-one million, seven hundred seventy-two thousand, five hundred fifteen".