194151131 has 4 divisors (see below), whose sum is σ = 194183064. Its totient is φ = 194119200.

The previous prime is 194151121. The next prime is 194151151. The reversal of 194151131 is 131151491.

194151131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 194151131 - 2¹⁸ = 193888987 is a prime.

It is a super-2 number, since 2×194151131² = 75389323337158322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 194151131.

It is not an unprimeable number, because it can be changed into a prime (194151121) 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, 3710 + ... + 20051.

It is an arithmetic number, because the mean of its divisors is an integer number (48545766).

Almost surely, 2^194151131 is an apocalyptic number.

194151131 is a deficient number, since it is larger than the sum of its proper divisors (31933).

194151131 is an equidigital number, since it uses as much as digits as its factorization.

194151131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31932.

The product of its digits is 540, while the sum is 26.

The square root of 194151131 is about 13933.8125077094. The cubic root of 194151131 is about 579.0463231651.

The spelling of 194151131 in words is "one hundred ninety-four million, one hundred fifty-one thousand, one hundred thirty-one".