115531501 has 4 divisors (see below), whose sum is σ = 118654012. Its totient is φ = 112408992.

The previous prime is 115531489. The next prime is 115531511. The reversal of 115531501 is 105135511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 95942025 + 19589476 = 9795^2 + 4426^2 .

It is a cyclic number.

It is not a de Polignac number, because 115531501 - 2⁵ = 115531469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115531511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1561200 + ... + 1561273.

It is an arithmetic number, because the mean of its divisors is an integer number (29663503).

Almost surely, 2^115531501 is an apocalyptic number.

It is an amenable number.

115531501 is a deficient number, since it is larger than the sum of its proper divisors (3122511).

115531501 is an equidigital number, since it uses as much as digits as its factorization.

115531501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3122510.

The product of its (nonzero) digits is 375, while the sum is 22.

The square root of 115531501 is about 10748.5580893439. The cubic root of 115531501 is about 487.0424386107.

The spelling of 115531501 in words is "one hundred fifteen million, five hundred thirty-one thousand, five hundred one".