158221807 has 8 divisors (see below), whose sum is σ = 166404096. Its totient is φ = 150148152.

The previous prime is 158221783. The next prime is 158221831. The reversal of 158221807 is 708122851.

It is an interprime number because it is at equal distance from previous prime (158221783) and next prime (158221831).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158221807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158225807) 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, 24163 + ... + 30004.

It is an arithmetic number, because the mean of its divisors is an integer number (20800512).

Almost surely, 2^158221807 is an apocalyptic number.

158221807 is a deficient number, since it is larger than the sum of its proper divisors (8182289).

158221807 is a wasteful number, since it uses less digits than its factorization.

158221807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54317.

The product of its (nonzero) digits is 8960, while the sum is 34.

The square root of 158221807 is about 12578.6250043477. The cubic root of 158221807 is about 540.8648771979.

The spelling of 158221807 in words is "one hundred fifty-eight million, two hundred twenty-one thousand, eight hundred seven".