158211842 has 4 divisors (see below), whose sum is σ = 237317766. Its totient is φ = 79105920.

The previous prime is 158211839. The next prime is 158211853. The reversal of 158211842 is 248112851.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 115584001 + 42627841 = 10751^2 + 6529^2 .

It is a junction number, because it is equal to n+sod(n) for n = 158211799 and 158211808.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39552959 + ... + 39552962.

Almost surely, 2^158211842 is an apocalyptic number.

158211842 is a deficient number, since it is larger than the sum of its proper divisors (79105924).

158211842 is an equidigital number, since it uses as much as digits as its factorization.

158211842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79105923.

The product of its digits is 5120, while the sum is 32.

The square root of 158211842 is about 12578.2288896331. The cubic root of 158211842 is about 540.8535221857.

The spelling of 158211842 in words is "one hundred fifty-eight million, two hundred eleven thousand, eight hundred forty-two".