131528811 has 8 divisors (see below), whose sum is σ = 184601920. Its totient is φ = 83070792.

The previous prime is 131528807. The next prime is 131528819. The reversal of 131528811 is 118825131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131528811 - 2² = 131528807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131528819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1153705 + ... + 1153818.

It is an arithmetic number, because the mean of its divisors is an integer number (23075240).

Almost surely, 2^131528811 is an apocalyptic number.

131528811 is a deficient number, since it is larger than the sum of its proper divisors (53073109).

131528811 is a wasteful number, since it uses less digits than its factorization.

131528811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2307545.

The product of its digits is 1920, while the sum is 30.

The square root of 131528811 is about 11468.6010916764. The cubic root of 131528811 is about 508.5577746746.

The spelling of 131528811 in words is "one hundred thirty-one million, five hundred twenty-eight thousand, eight hundred eleven".