118531057 has 4 divisors (see below), whose sum is σ = 118555300. Its totient is φ = 118506816.

The previous prime is 118531051. The next prime is 118531093. The reversal of 118531057 is 750135811.

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 74028816 + 44502241 = 8604^2 + 6671^2 .

It is a cyclic number.

It is not a de Polignac number, because 118531057 - 2¹¹ = 118529009 is a prime.

It is a super-2 number, since 2×118531057² = 28099222947074498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118531051) 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 3 ways as a sum of consecutive naturals, for example, 1932 + ... + 15517.

It is an arithmetic number, because the mean of its divisors is an integer number (29638825).

Almost surely, 2^118531057 is an apocalyptic number.

It is an amenable number.

118531057 is a deficient number, since it is larger than the sum of its proper divisors (24243).

118531057 is an equidigital number, since it uses as much as digits as its factorization.

118531057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24242.

The product of its (nonzero) digits is 4200, while the sum is 31.

The square root of 118531057 is about 10887.1969303398. The cubic root of 118531057 is about 491.2215212682.

Adding to 118531057 its reverse (750135811), we get a palindrome (868666868).

The spelling of 118531057 in words is "one hundred eighteen million, five hundred thirty-one thousand, fifty-seven".