158207317 has 4 divisors (see below), whose sum is σ = 165085920. Its totient is φ = 151328716.

The previous prime is 158207299. The next prime is 158207323. The reversal of 158207317 is 713702851.

158207317 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158207317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158207327) 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, 3439267 + ... + 3439312.

It is an arithmetic number, because the mean of its divisors is an integer number (41271480).

Almost surely, 2^158207317 is an apocalyptic number.

It is an amenable number.

158207317 is a deficient number, since it is larger than the sum of its proper divisors (6878603).

158207317 is an equidigital number, since it uses as much as digits as its factorization.

158207317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6878602.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 158207317 is about 12578.0490140562. The cubic root of 158207317 is about 540.8483658386.

The spelling of 158207317 in words is "one hundred fifty-eight million, two hundred seven thousand, three hundred seventeen".