131215575 has 96 divisors (see below), whose sum is σ = 243555840. Its totient is φ = 62092800.

The previous prime is 131215573. The next prime is 131215627. The reversal of 131215575 is 575512131.

It is not a de Polignac number, because 131215575 - 2¹ = 131215573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131215573) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2151045 + ... + 2151105.

It is an arithmetic number, because the mean of its divisors is an integer number (2537040).

Almost surely, 2^131215575 is an apocalyptic number.

131215575 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131215575 is a deficient number, since it is larger than the sum of its proper divisors (112340265).

131215575 is a wasteful number, since it uses less digits than its factorization.

131215575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169 (or 164 counting only the distinct ones).

The product of its digits is 5250, while the sum is 30.

The square root of 131215575 is about 11454.9367086859. The cubic root of 131215575 is about 508.1537434816.

The spelling of 131215575 in words is "one hundred thirty-one million, two hundred fifteen thousand, five hundred seventy-five".