118428551 has 4 divisors (see below), whose sum is σ = 119137872. Its totient is φ = 117719232.

The previous prime is 118428529. The next prime is 118428571. The reversal of 118428551 is 155824811.

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

It is a cyclic number.

It is not a de Polignac number, because 118428551 - 2⁶ = 118428487 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 (118428571) 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, 354410 + ... + 354743.

It is an arithmetic number, because the mean of its divisors is an integer number (29784468).

Almost surely, 2^118428551 is an apocalyptic number.

118428551 is a deficient number, since it is larger than the sum of its proper divisors (709321).

118428551 is an equidigital number, since it uses as much as digits as its factorization.

118428551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709320.

The product of its digits is 12800, while the sum is 35.

The square root of 118428551 is about 10882.4882724495. The cubic root of 118428551 is about 491.0798771661.

The spelling of 118428551 in words is "one hundred eighteen million, four hundred twenty-eight thousand, five hundred fifty-one".