118211965 has 8 divisors (see below), whose sum is σ = 150198840. Its totient is φ = 89006592.

The previous prime is 118211953. The next prime is 118211969. The reversal of 118211965 is 569112811.

It can be written as a sum of positive squares in 4 ways, for example, as 32501401 + 85710564 = 5701^2 + 9258^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 118211965 - 2¹⁹ = 117687677 is a prime.

It is a super-2 number, since 2×118211965² = 27948137338322450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 118211965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118211969) 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, 695280 + ... + 695449.

It is an arithmetic number, because the mean of its divisors is an integer number (18774855).

Almost surely, 2^118211965 is an apocalyptic number.

It is an amenable number.

118211965 is a deficient number, since it is larger than the sum of its proper divisors (31986875).

118211965 is a wasteful number, since it uses less digits than its factorization.

118211965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390751.

The product of its digits is 4320, while the sum is 34.

The square root of 118211965 is about 10872.5325936508. The cubic root of 118211965 is about 490.7803268460.

The spelling of 118211965 in words is "one hundred eighteen million, two hundred eleven thousand, nine hundred sixty-five".