118825581 has 16 divisors (see below), whose sum is σ = 181865600. Its totient is φ = 67601088.

The previous prime is 118825571. The next prime is 118825589. The reversal of 118825581 is 185528811.

It is not a de Polignac number, because 118825581 - 2⁶ = 118825517 is a prime.

It is a super-2 number, since 2×118825581² = 28239037399975122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118825589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7546 + ... + 17163.

It is an arithmetic number, because the mean of its divisors is an integer number (11366600).

Almost surely, 2^118825581 is an apocalyptic number.

It is an amenable number.

118825581 is a deficient number, since it is larger than the sum of its proper divisors (63040019).

118825581 is a wasteful number, since it uses less digits than its factorization.

118825581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24948.

The product of its digits is 25600, while the sum is 39.

The square root of 118825581 is about 10900.7147013395. The cubic root of 118825581 is about 491.6280444366.

The spelling of 118825581 in words is "one hundred eighteen million, eight hundred twenty-five thousand, five hundred eighty-one".