158081285 has 4 divisors (see below), whose sum is σ = 189697548. Its totient is φ = 126465024.

The previous prime is 158081269. The next prime is 158081293. The reversal of 158081285 is 582180851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 582180851 = 7 ⋅83168693.

It can be written as a sum of positive squares in 2 ways, for example, as 71944324 + 86136961 = 8482^2 + 9281^2 .

It is a cyclic number.

It is not a de Polignac number, because 158081285 - 2⁴ = 158081269 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15808124 + ... + 15808133.

It is an arithmetic number, because the mean of its divisors is an integer number (47424387).

Almost surely, 2^158081285 is an apocalyptic number.

It is an amenable number.

158081285 is a deficient number, since it is larger than the sum of its proper divisors (31616263).

158081285 is an equidigital number, since it uses as much as digits as its factorization.

158081285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31616262.

The product of its (nonzero) digits is 25600, while the sum is 38.

The square root of 158081285 is about 12573.0380179175. The cubic root of 158081285 is about 540.7047097991.

The spelling of 158081285 in words is "one hundred fifty-eight million, eighty-one thousand, two hundred eighty-five".