158771217 has 16 divisors (see below), whose sum is σ = 235855872. Its totient is φ = 94176720.

The previous prime is 158771191. The next prime is 158771219. The reversal of 158771217 is 712177851.

It is not a de Polignac number, because 158771217 - 2⁶ = 158771153 is a prime.

It is a super-2 number, since 2×158771217² = 50416598695322178, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (158771219) 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, 49633 + ... + 52734.

It is an arithmetic number, because the mean of its divisors is an integer number (14740992).

Almost surely, 2^158771217 is an apocalyptic number.

It is an amenable number.

158771217 is a deficient number, since it is larger than the sum of its proper divisors (77084655).

158771217 is a wasteful number, since it uses less digits than its factorization.

158771217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102428.

The product of its digits is 27440, while the sum is 39.

The square root of 158771217 is about 12600.4451111856. The cubic root of 158771217 is about 541.4901877257.

The spelling of 158771217 in words is "one hundred fifty-eight million, seven hundred seventy-one thousand, two hundred seventeen".