194157031 has 2 divisors, whose sum is σ = 194157032. Its totient is φ = 194157030.

The previous prime is 194156993. The next prime is 194157037. The reversal of 194157031 is 130751491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 194157031 - 2⁹ = 194156519 is a prime.

It is a super-2 number, since 2×194157031² = 75393905373469922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 194156984 and 194157002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194157037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97078515 + 97078516.

It is an arithmetic number, because the mean of its divisors is an integer number (97078516).

Almost surely, 2^194157031 is an apocalyptic number.

194157031 is a deficient number, since it is larger than the sum of its proper divisors (1).

194157031 is an equidigital number, since it uses as much as digits as its factorization.

194157031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 194157031 is about 13934.0242213081. The cubic root of 194157031 is about 579.0521885936.

The spelling of 194157031 in words is "one hundred ninety-four million, one hundred fifty-seven thousand, thirty-one".