118113521 has 8 divisors (see below), whose sum is σ = 120588264. Its totient is φ = 115648000.

The previous prime is 118113493. The next prime is 118113529. The reversal of 118113521 is 125311811.

It can be written as a sum of positive squares in 4 ways, for example, as 87025 + 118026496 = 295^2 + 10864^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118113521 is a prime.

It is a super-3 number, since 3×118113521³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118113529) 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, 27521 + ... + 31521.

It is an arithmetic number, because the mean of its divisors is an integer number (15073533).

Almost surely, 2^118113521 is an apocalyptic number.

It is an amenable number.

118113521 is a deficient number, since it is larger than the sum of its proper divisors (2474743).

118113521 is an equidigital number, since it uses as much as digits as its factorization.

118113521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4611.

The product of its digits is 240, while the sum is 23.

The square root of 118113521 is about 10868.0044626417. The cubic root of 118113521 is about 490.6440524388.

The spelling of 118113521 in words is "one hundred eighteen million, one hundred thirteen thousand, five hundred twenty-one".