118445551 has 4 divisors (see below), whose sum is σ = 135366352. Its totient is φ = 101524752.

The previous prime is 118445549. The next prime is 118445557. The reversal of 118445551 is 155544811.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 118445551 - 2¹ = 118445549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118445557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8460390 + ... + 8460403.

It is an arithmetic number, because the mean of its divisors is an integer number (33841588).

Almost surely, 2^118445551 is an apocalyptic number.

118445551 is a deficient number, since it is larger than the sum of its proper divisors (16920801).

118445551 is an equidigital number, since it uses as much as digits as its factorization.

118445551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16920800.

The product of its digits is 16000, while the sum is 34.

The square root of 118445551 is about 10883.2693157893. The cubic root of 118445551 is about 491.1033736355.

The spelling of 118445551 in words is "one hundred eighteen million, four hundred forty-five thousand, five hundred fifty-one".