158447881 has 4 divisors (see below), whose sum is σ = 158889600. Its totient is φ = 158006164.

The previous prime is 158447873. The next prime is 158447917. The reversal of 158447881 is 188744851.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 158447881 - 2³ = 158447873 is a prime.

It is a super-2 number, since 2×158447881² = 50211461986780322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158447281) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 220321 + ... + 221038.

It is an arithmetic number, because the mean of its divisors is an integer number (39722400).

Almost surely, 2^158447881 is an apocalyptic number.

It is an amenable number.

158447881 is a deficient number, since it is larger than the sum of its proper divisors (441719).

158447881 is an equidigital number, since it uses as much as digits as its factorization.

158447881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441718.

The product of its digits is 286720, while the sum is 46.

The square root of 158447881 is about 12587.6082319081. The cubic root of 158447881 is about 541.1223581298.

The spelling of 158447881 in words is "one hundred fifty-eight million, four hundred forty-seven thousand, eight hundred eighty-one".