158281313 has 4 divisors (see below), whose sum is σ = 159252528. Its totient is φ = 157310100.

The previous prime is 158281309. The next prime is 158281337. The reversal of 158281313 is 313182851.

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, and also an emirpimes, since its reverse is a distinct semiprime: 313182851 = 4231 ⋅74021.

It is a cyclic number.

It is not a de Polignac number, because 158281313 - 2² = 158281309 is a prime.

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 158281313.

It is not an unprimeable number, because it can be changed into a prime (158281213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485363 + ... + 485688.

It is an arithmetic number, because the mean of its divisors is an integer number (39813132).

Almost surely, 2^158281313 is an apocalyptic number.

It is an amenable number.

158281313 is a deficient number, since it is larger than the sum of its proper divisors (971215).

158281313 is an equidigital number, since it uses as much as digits as its factorization.

158281313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971214.

The product of its digits is 5760, while the sum is 32.

The square root of 158281313 is about 12580.9901438639. The cubic root of 158281313 is about 540.9326737341.

The spelling of 158281313 in words is "one hundred fifty-eight million, two hundred eighty-one thousand, three hundred thirteen".