131528915 has 32 divisors (see below), whose sum is σ = 191808000. Its totient is φ = 84524544.

The previous prime is 131528911. The next prime is 131528977. The reversal of 131528915 is 519825131.

It is not a de Polignac number, because 131528915 - 2² = 131528911 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (131528911) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 263336 + ... + 263834.

It is an arithmetic number, because the mean of its divisors is an integer number (5994000).

Almost surely, 2^131528915 is an apocalyptic number.

131528915 is a deficient number, since it is larger than the sum of its proper divisors (60279085).

131528915 is a wasteful number, since it uses less digits than its factorization.

131528915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971.

The product of its digits is 10800, while the sum is 35.

The square root of 131528915 is about 11468.6056257943. The cubic root of 131528915 is about 508.5579087137.

The spelling of 131528915 in words is "one hundred thirty-one million, five hundred twenty-eight thousand, nine hundred fifteen".