158308221 has 8 divisors (see below), whose sum is σ = 213014560. Its totient is φ = 104570352.

The previous prime is 158308159. The next prime is 158308231. The reversal of 158308221 is 122803851.

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

It is not a de Polignac number, because 158308221 - 2¹⁰ = 158307197 is a prime.

It is a super-2 number, since 2×158308221² = 50122985672369682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158308231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241735 + ... + 242388.

It is an arithmetic number, because the mean of its divisors is an integer number (26626820).

Almost surely, 2^158308221 is an apocalyptic number.

It is an amenable number.

158308221 is a deficient number, since it is larger than the sum of its proper divisors (54706339).

158308221 is a wasteful number, since it uses less digits than its factorization.

158308221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484235.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 158308221 is about 12582.0594896066. The cubic root of 158308221 is about 540.9633250502.

The spelling of 158308221 in words is "one hundred fifty-eight million, three hundred eight thousand, two hundred twenty-one".