158854221 has 6 divisors (see below), whose sum is σ = 229456110. Its totient is φ = 105902808.

The previous prime is 158854211. The next prime is 158854249. The reversal of 158854221 is 122458851.

158854221 is a `hidden beast` number, since 1 + 588 + 54 + 2 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 137592900 + 21261321 = 11730^2 + 4611^2 .

It is not a de Polignac number, because 158854221 - 2¹⁰ = 158853197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158854211) 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 5 ways as a sum of consecutive naturals, for example, 8825226 + ... + 8825243.

It is an arithmetic number, because the mean of its divisors is an integer number (38242685).

Almost surely, 2^158854221 is an apocalyptic number.

It is an amenable number.

158854221 is a deficient number, since it is larger than the sum of its proper divisors (70601889).

158854221 is a wasteful number, since it uses less digits than its factorization.

158854221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17650475 (or 17650472 counting only the distinct ones).

The product of its digits is 25600, while the sum is 36.

The square root of 158854221 is about 12603.7383739905. The cubic root of 158854221 is about 541.5845331666.

The spelling of 158854221 in words is "one hundred fifty-eight million, eight hundred fifty-four thousand, two hundred twenty-one".