158543442 has 12 divisors (see below), whose sum is σ = 343510830. Its totient is φ = 52847808.

The previous prime is 158543431. The next prime is 158543447. The reversal of 158543442 is 244345851.

It is a happy number.

158543442 is a `hidden beast` number, since 1 + 585 + 4 + 34 + 42 = 666.

158543442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 149597361 + 8946081 = 12231^2 + 2991^2 .

It is a junction number, because it is equal to n+sod(n) for n = 158543397 and 158543406.

It is not an unprimeable number, because it can be changed into a prime (158543447) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4403967 + ... + 4404002.

Almost surely, 2^158543442 is an apocalyptic number.

158543442 is an abundant number, since it is smaller than the sum of its proper divisors (184967388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

158543442 is a wasteful number, since it uses less digits than its factorization.

158543442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8807977 (or 8807974 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

The square root of 158543442 is about 12591.4034960365. The cubic root of 158543442 is about 541.2311211318.

The spelling of 158543442 in words is "one hundred fifty-eight million, five hundred forty-three thousand, four hundred forty-two".