194231155 has 4 divisors (see below), whose sum is σ = 233077392. Its totient is φ = 155384920.

The previous prime is 194231153. The next prime is 194231203. The reversal of 194231155 is 551132491.

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

It is not a de Polignac number, because 194231155 - 2¹ = 194231153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194231153) 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, 19423111 + ... + 19423120.

It is an arithmetic number, because the mean of its divisors is an integer number (58269348).

Almost surely, 2^194231155 is an apocalyptic number.

194231155 is a deficient number, since it is larger than the sum of its proper divisors (38846237).

194231155 is an equidigital number, since it uses as much as digits as its factorization.

194231155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38846236.

The product of its digits is 5400, while the sum is 31.

The square root of 194231155 is about 13936.6837877596. The cubic root of 194231155 is about 579.1258681357.

The spelling of 194231155 in words is "one hundred ninety-four million, two hundred thirty-one thousand, one hundred fifty-five".