158520971 has 16 divisors (see below), whose sum is σ = 201922560. Its totient is φ = 121150080.

The previous prime is 158520959. The next prime is 158520977. The reversal of 158520971 is 179025851.

It is not a de Polignac number, because 158520971 - 2⁶ = 158520907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (158520977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32795 + ... + 37316.

It is an arithmetic number, because the mean of its divisors is an integer number (12620160).

Almost surely, 2^158520971 is an apocalyptic number.

158520971 is a deficient number, since it is larger than the sum of its proper divisors (43401589).

158520971 is a wasteful number, since it uses less digits than its factorization.

158520971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70154.

The product of its (nonzero) digits is 25200, while the sum is 38.

The square root of 158520971 is about 12590.5111492743. The cubic root of 158520971 is about 541.2055496354.

The spelling of 158520971 in words is "one hundred fifty-eight million, five hundred twenty thousand, nine hundred seventy-one".