158521317 has 8 divisors (see below), whose sum is σ = 212269824. Its totient is φ = 105226848.

The previous prime is 158521303. The next prime is 158521333. The reversal of 158521317 is 713125851.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 158521317 - 2⁴ = 158521301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158525317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112693 + ... + 114090.

It is an arithmetic number, because the mean of its divisors is an integer number (26533728).

Almost surely, 2^158521317 is an apocalyptic number.

It is an amenable number.

158521317 is a deficient number, since it is larger than the sum of its proper divisors (53748507).

158521317 is a wasteful number, since it uses less digits than its factorization.

158521317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227019.

The product of its digits is 8400, while the sum is 33.

The square root of 158521317 is about 12590.5248897733. The cubic root of 158521317 is about 541.2059433940.

The spelling of 158521317 in words is "one hundred fifty-eight million, five hundred twenty-one thousand, three hundred seventeen".