155418227 has 4 divisors (see below), whose sum is σ = 155463840. Its totient is φ = 155372616.

The previous prime is 155418217. The next prime is 155418251. The reversal of 155418227 is 722814551.

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 155418227 - 2¹⁴ = 155401843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155418217) 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, 17243 + ... + 24660.

It is an arithmetic number, because the mean of its divisors is an integer number (38865960).

Almost surely, 2^155418227 is an apocalyptic number.

155418227 is a deficient number, since it is larger than the sum of its proper divisors (45613).

155418227 is an equidigital number, since it uses as much as digits as its factorization.

155418227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45612.

The product of its digits is 22400, while the sum is 35.

The square root of 155418227 is about 12466.6846835877. The cubic root of 155418227 is about 537.6512379177.

The spelling of 155418227 in words is "one hundred fifty-five million, four hundred eighteen thousand, two hundred twenty-seven".