115561501 has 8 divisors (see below), whose sum is σ = 126206208. Its totient is φ = 104940000.

The previous prime is 115561483. The next prime is 115561513. The reversal of 115561501 is 105165511.

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

It is not a de Polignac number, because 115561501 - 2⁷ = 115561373 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 (115561541) 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, 5601 + ... + 16201.

It is an arithmetic number, because the mean of its divisors is an integer number (15775776).

Almost surely, 2^115561501 is an apocalyptic number.

115561501 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

115561501 is a deficient number, since it is larger than the sum of its proper divisors (10644707).

115561501 is a wasteful number, since it uses less digits than its factorization.

115561501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11603.

The product of its (nonzero) digits is 750, while the sum is 25.

The square root of 115561501 is about 10749.9535347833. The cubic root of 115561501 is about 487.0845916412.

The spelling of 115561501 in words is "one hundred fifteen million, five hundred sixty-one thousand, five hundred one".