194231157 has 4 divisors (see below), whose sum is σ = 258974880. Its totient is φ = 129487436.

The previous prime is 194231153. The next prime is 194231203. The reversal of 194231157 is 751132491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 194231157 - 2² = 194231153 is a prime.

It is a congruent 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, 32371857 + ... + 32371862.

It is an arithmetic number, because the mean of its divisors is an integer number (64743720).

Almost surely, 2^194231157 is an apocalyptic number.

It is an amenable number.

194231157 is a deficient number, since it is larger than the sum of its proper divisors (64743723).

194231157 is an equidigital number, since it uses as much as digits as its factorization.

194231157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64743722.

The product of its digits is 7560, while the sum is 33.

The square root of 194231157 is about 13936.6838595126. The cubic root of 194231157 is about 579.1258701235.

The spelling of 194231157 in words is "one hundred ninety-four million, two hundred thirty-one thousand, one hundred fifty-seven".