158432217 has 8 divisors (see below), whose sum is σ = 211557696. Its totient is φ = 105464112.

The previous prime is 158432213. The next prime is 158432221. The reversal of 158432217 is 712234851.

It is an interprime number because it is at equal distance from previous prime (158432213) and next prime (158432221).

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

It is not a de Polignac number, because 158432217 - 2² = 158432213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (158432213) 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, 36973 + ... + 41034.

It is an arithmetic number, because the mean of its divisors is an integer number (26444712).

Almost surely, 2^158432217 is an apocalyptic number.

It is an amenable number.

158432217 is a deficient number, since it is larger than the sum of its proper divisors (53125479).

158432217 is an equidigital number, since it uses as much as digits as its factorization.

158432217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78687.

The product of its digits is 13440, while the sum is 33.

The square root of 158432217 is about 12586.9860173117. The cubic root of 158432217 is about 541.1045259361.

The spelling of 158432217 in words is "one hundred fifty-eight million, four hundred thirty-two thousand, two hundred seventeen".