118155547 has 4 divisors (see below), whose sum is σ = 124374280. Its totient is φ = 111936816.

The previous prime is 118155511. The next prime is 118155553. The reversal of 118155547 is 745551811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 745551811 = 19 ⋅39239569.

It is a cyclic number.

It is not a de Polignac number, because 118155547 - 2⁷ = 118155419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118153547) 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, 3109338 + ... + 3109375.

It is an arithmetic number, because the mean of its divisors is an integer number (31093570).

Almost surely, 2^118155547 is an apocalyptic number.

118155547 is a deficient number, since it is larger than the sum of its proper divisors (6218733).

118155547 is an equidigital number, since it uses as much as digits as its factorization.

118155547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6218732.

The product of its digits is 28000, while the sum is 37.

The square root of 118155547 is about 10869.9377643113. The cubic root of 118155547 is about 490.7022375973.

The spelling of 118155547 in words is "one hundred eighteen million, one hundred fifty-five thousand, five hundred forty-seven".