158781133 has 4 divisors (see below), whose sum is σ = 181464160. Its totient is φ = 136098108.

The previous prime is 158781127. The next prime is 158781149. The reversal of 158781133 is 331187851.

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: 331187851 = 37 ⋅8951023.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158781133 is a prime.

It is a super-2 number, since 2×158781133² = 50422896393527378, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 158781092 and 158781101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158781113) 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, 11341503 + ... + 11341516.

It is an arithmetic number, because the mean of its divisors is an integer number (45366040).

Almost surely, 2^158781133 is an apocalyptic number.

It is an amenable number.

158781133 is a deficient number, since it is larger than the sum of its proper divisors (22683027).

158781133 is an equidigital number, since it uses as much as digits as its factorization.

158781133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22683026.

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

The square root of 158781133 is about 12600.8385832055. The cubic root of 158781133 is about 541.5014603502.

The spelling of 158781133 in words is "one hundred fifty-eight million, seven hundred eighty-one thousand, one hundred thirty-three".