158118481 has 4 divisors (see below), whose sum is σ = 161482752. Its totient is φ = 154754212.

The previous prime is 158118431. The next prime is 158118487. The reversal of 158118481 is 184811851.

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 158118481 - 2²³ = 149729873 is a prime.

It is a super-2 number, since 2×158118481² = 50002908067494722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 158118481.

It is not an unprimeable number, because it can be changed into a prime (158118487) 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, 1682065 + ... + 1682158.

It is an arithmetic number, because the mean of its divisors is an integer number (40370688).

Almost surely, 2^158118481 is an apocalyptic number.

It is an amenable number.

158118481 is a deficient number, since it is larger than the sum of its proper divisors (3364271).

158118481 is an equidigital number, since it uses as much as digits as its factorization.

158118481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3364270.

The product of its digits is 10240, while the sum is 37.

The square root of 158118481 is about 12574.5171279059. The cubic root of 158118481 is about 540.7471151460.

The spelling of 158118481 in words is "one hundred fifty-eight million, one hundred eighteen thousand, four hundred eighty-one".