158133197 has 4 divisors (see below), whose sum is σ = 158407836. Its totient is φ = 157858560.

The previous prime is 158133179. The next prime is 158133223. The reversal of 158133197 is 791331851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 791331851 = 23773 ⋅33287.

It can be written as a sum of positive squares in 2 ways, for example, as 150454756 + 7678441 = 12266^2 + 2771^2 .

It is a cyclic number.

It is not a de Polignac number, because 158133197 - 2¹⁰ = 158132173 is a prime.

It is a super-2 number, since 2×158133197² = 50012215986881618, 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 158133197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158133127) 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 in 3 ways as a sum of consecutive naturals, for example, 136454 + ... + 137607.

It is an arithmetic number, because the mean of its divisors is an integer number (39601959).

Almost surely, 2^158133197 is an apocalyptic number.

It is an amenable number.

158133197 is a deficient number, since it is larger than the sum of its proper divisors (274639).

158133197 is an equidigital number, since it uses as much as digits as its factorization.

158133197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274638.

The product of its digits is 22680, while the sum is 38.

The square root of 158133197 is about 12575.1022659858. The cubic root of 158133197 is about 540.7638903043.

The spelling of 158133197 in words is "one hundred fifty-eight million, one hundred thirty-three thousand, one hundred ninety-seven".