118221873 has 32 divisors (see below), whose sum is σ = 200724480. Its totient is φ = 60101760.

The previous prime is 118221871. The next prime is 118221877. The reversal of 118221873 is 378122811.

It is not a de Polignac number, because 118221873 - 2¹ = 118221871 is a prime.

It is a super-2 number, since 2×118221873² = 27952822511256258, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (118221871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5413 + ... + 16301.

It is an arithmetic number, because the mean of its divisors is an integer number (6272640).

Almost surely, 2^118221873 is an apocalyptic number.

It is an amenable number.

118221873 is a deficient number, since it is larger than the sum of its proper divisors (82502607).

118221873 is a wasteful number, since it uses less digits than its factorization.

118221873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10957.

The product of its digits is 5376, while the sum is 33.

The square root of 118221873 is about 10872.9882277137. The cubic root of 118221873 is about 490.7940381361.

It can be divided in two parts, 11822 and 1873, that added together give a triangular number (13695 = T₁₆₅).

The spelling of 118221873 in words is "one hundred eighteen million, two hundred twenty-one thousand, eight hundred seventy-three".