158331733 has 4 divisors (see below), whose sum is σ = 180950560. Its totient is φ = 135712908.

The previous prime is 158331707. The next prime is 158331743. The reversal of 158331733 is 337133851.

It is a happy number.

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: 337133851 = 17 ⋅19831403.

It is a cyclic number.

It is not a de Polignac number, because 158331733 - 2⁹ = 158331221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158331743) 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, 11309403 + ... + 11309416.

It is an arithmetic number, because the mean of its divisors is an integer number (45237640).

Almost surely, 2^158331733 is an apocalyptic number.

It is an amenable number.

158331733 is a deficient number, since it is larger than the sum of its proper divisors (22618827).

158331733 is an equidigital number, since it uses as much as digits as its factorization.

158331733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22618826.

The product of its digits is 22680, while the sum is 34.

The square root of 158331733 is about 12582.9938011588. The cubic root of 158331733 is about 540.9901050872.

The spelling of 158331733 in words is "one hundred fifty-eight million, three hundred thirty-one thousand, seven hundred thirty-three".