158623381 has 16 divisors (see below), whose sum is σ = 192348160. Its totient is φ = 127779120.

The previous prime is 158623357. The next prime is 158623391. The reversal of 158623381 is 183326851.

158623381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 158623381 - 2⁷ = 158623253 is a prime.

It is a super-2 number, since 2×158623381² = 50322753999742322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 158623381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158623391) 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, 12196 + ... + 21586.

It is an arithmetic number, because the mean of its divisors is an integer number (12021760).

Almost surely, 2^158623381 is an apocalyptic number.

It is an amenable number.

158623381 is a deficient number, since it is larger than the sum of its proper divisors (33724779).

158623381 is a wasteful number, since it uses less digits than its factorization.

158623381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9544.

The product of its digits is 34560, while the sum is 37.

The square root of 158623381 is about 12594.5774442813. The cubic root of 158623381 is about 541.3220703473.

The spelling of 158623381 in words is "one hundred fifty-eight million, six hundred twenty-three thousand, three hundred eighty-one".