158422013 has 2 divisors, whose sum is σ = 158422014. Its totient is φ = 158422012.

The previous prime is 158422009. The next prime is 158422037. The reversal of 158422013 is 310224851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117115684 + 41306329 = 10822^2 + 6427^2 .

It is a cyclic number.

It is not a de Polignac number, because 158422013 - 2² = 158422009 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158422003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79211006 + 79211007.

It is an arithmetic number, because the mean of its divisors is an integer number (79211007).

Almost surely, 2^158422013 is an apocalyptic number.

It is an amenable number.

158422013 is a deficient number, since it is larger than the sum of its proper divisors (1).

158422013 is an equidigital number, since it uses as much as digits as its factorization.

158422013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 158422013 is about 12586.5806714930. The cubic root of 158422013 is about 541.0929088773.

Adding to 158422013 its reverse (310224851), we get a palindrome (468646864).

The spelling of 158422013 in words is "one hundred fifty-eight million, four hundred twenty-two thousand, thirteen".