158871722 has 4 divisors (see below), whose sum is σ = 238307586. Its totient is φ = 79435860.

The previous prime is 158871721. The next prime is 158871743. The reversal of 158871722 is 227178851.

158871722 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 227178851 = 59 ⋅3850489.

It can be written as a sum of positive squares in only one way, i.e., 85581001 + 73290721 = 9251^2 + 8561^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 158871722.

It is not an unprimeable number, because it can be changed into a prime (158871721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39717929 + ... + 39717932.

Almost surely, 2^158871722 is an apocalyptic number.

158871722 is a deficient number, since it is larger than the sum of its proper divisors (79435864).

158871722 is an equidigital number, since it uses as much as digits as its factorization.

158871722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79435863.

The product of its digits is 62720, while the sum is 41.

The square root of 158871722 is about 12604.4326330065. The cubic root of 158871722 is about 541.6044212603.

The spelling of 158871722 in words is "one hundred fifty-eight million, eight hundred seventy-one thousand, seven hundred twenty-two".