115133561 has 8 divisors (see below), whose sum is σ = 121007040. Its totient is φ = 109332432.

The previous prime is 115133549. The next prime is 115133563. The reversal of 115133561 is 165331511.

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

It is a de Polignac number, because none of the positive numbers 2^k-115133561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 115133561.

It is not an unprimeable number, because it can be changed into a prime (115133563) 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, 14810 + ... + 21203.

It is an arithmetic number, because the mean of its divisors is an integer number (15125880).

Almost surely, 2^115133561 is an apocalyptic number.

It is an amenable number.

115133561 is a deficient number, since it is larger than the sum of its proper divisors (5873479).

115133561 is a wasteful number, since it uses less digits than its factorization.

115133561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36175.

The product of its digits is 1350, while the sum is 26.

The square root of 115133561 is about 10730.0308014469. The cubic root of 115133561 is about 486.4826010515.

The spelling of 115133561 in words is "one hundred fifteen million, one hundred thirty-three thousand, five hundred sixty-one".