158522431 has 4 divisors (see below), whose sum is σ = 158977000. Its totient is φ = 158067864.

The previous prime is 158522423. The next prime is 158522443. The reversal of 158522431 is 134225851.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 158522431 - 2³ = 158522423 is a prime.

It is a super-2 number, since 2×158522431² = 50258722260299522, 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 = 158522393 and 158522402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158522471) 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, 226761 + ... + 227458.

It is an arithmetic number, because the mean of its divisors is an integer number (39744250).

Almost surely, 2^158522431 is an apocalyptic number.

158522431 is a deficient number, since it is larger than the sum of its proper divisors (454569).

158522431 is an equidigital number, since it uses as much as digits as its factorization.

158522431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454568.

The product of its digits is 9600, while the sum is 31.

The square root of 158522431 is about 12590.5691293126. The cubic root of 158522431 is about 541.2072111562.

The spelling of 158522431 in words is "one hundred fifty-eight million, five hundred twenty-two thousand, four hundred thirty-one".