158178313 has 4 divisors (see below), whose sum is σ = 158254740. Its totient is φ = 158101888.

The previous prime is 158178301. The next prime is 158178323. The reversal of 158178313 is 313871851.

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

It can be written as a sum of positive squares in 2 ways, for example, as 95023504 + 63154809 = 9748^2 + 7947^2 .

It is a cyclic number.

It is not a de Polignac number, because 158178313 - 2⁵ = 158178281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158178323) 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, 35020 + ... + 39277.

It is an arithmetic number, because the mean of its divisors is an integer number (39563685).

Almost surely, 2^158178313 is an apocalyptic number.

It is an amenable number.

158178313 is a deficient number, since it is larger than the sum of its proper divisors (76427).

158178313 is an equidigital number, since it uses as much as digits as its factorization.

158178313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76426.

The product of its digits is 20160, while the sum is 37.

The square root of 158178313 is about 12576.8960002061. The cubic root of 158178313 is about 540.8153127430.

The spelling of 158178313 in words is "one hundred fifty-eight million, one hundred seventy-eight thousand, three hundred thirteen".