158430021 has 16 divisors (see below), whose sum is σ = 224025984. Its totient is φ = 99247104.

The previous prime is 158430011. The next prime is 158430023. The reversal of 158430021 is 120034851.

158430021 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 158430021 - 2¹⁰ = 158428997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 158429973 and 158430000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158430023) 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, 34941 + ... + 39213.

It is an arithmetic number, because the mean of its divisors is an integer number (14001624).

Almost surely, 2^158430021 is an apocalyptic number.

It is an amenable number.

158430021 is a deficient number, since it is larger than the sum of its proper divisors (65595963).

158430021 is a wasteful number, since it uses less digits than its factorization.

158430021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5020.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 158430021 is about 12586.8987840532. The cubic root of 158430021 is about 541.1020258742.

Adding to 158430021 its reverse (120034851), we get a palindrome (278464872).

The spelling of 158430021 in words is "one hundred fifty-eight million, four hundred thirty thousand, twenty-one".