158244381 has 16 divisors (see below), whose sum is σ = 248227200. Its totient is φ = 99290304.

The previous prime is 158244371. The next prime is 158244389. The reversal of 158244381 is 183442851.

158244381 is a `hidden beast` number, since 1 + 582 + 44 + 38 + 1 = 666.

It is not a de Polignac number, because 158244381 - 2¹³ = 158236189 is a prime.

It is a super-2 number, since 2×158244381² = 50082568236146322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158244389) 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, 171921 + ... + 172838.

It is an arithmetic number, because the mean of its divisors is an integer number (15514200).

Almost surely, 2^158244381 is an apocalyptic number.

It is an amenable number.

158244381 is a deficient number, since it is larger than the sum of its proper divisors (89982819).

158244381 is a wasteful number, since it uses less digits than its factorization.

158244381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344785 (or 344779 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 158244381 is about 12579.5222882270. The cubic root of 158244381 is about 540.8905982692.

The spelling of 158244381 in words is "one hundred fifty-eight million, two hundred forty-four thousand, three hundred eighty-one".