131515245 has 72 divisors (see below), whose sum is σ = 250355040. Its totient is φ = 66134880.

The previous prime is 131515229. The next prime is 131515253. The reversal of 131515245 is 542515131.

131515245 is a `hidden beast` number, since 131 + 5 + 1 + 524 + 5 = 666.

It is not a de Polignac number, because 131515245 - 2⁴ = 131515229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 623190 + ... + 623400.

Almost surely, 2^131515245 is an apocalyptic number.

131515245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131515245 is a deficient number, since it is larger than the sum of its proper divisors (118839795).

131515245 is an frugal number, since it uses more digits than its factorization.

131515245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259 (or 238 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 131515245 is about 11468.0096355035. The cubic root of 131515245 is about 508.5402897045.

The spelling of 131515245 in words is "one hundred thirty-one million, five hundred fifteen thousand, two hundred forty-five".