158342251 has 4 divisors (see below), whose sum is σ = 158587632. Its totient is φ = 158096872.

The previous prime is 158342243. The next prime is 158342293. The reversal of 158342251 is 152243851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 152243851 = 2477 ⋅61463.

It is a cyclic number.

It is not a de Polignac number, because 158342251 - 2³ = 158342243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158342231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121720 + ... + 123013.

It is an arithmetic number, because the mean of its divisors is an integer number (39646908).

Almost surely, 2^158342251 is an apocalyptic number.

158342251 is a deficient number, since it is larger than the sum of its proper divisors (245381).

158342251 is an equidigital number, since it uses as much as digits as its factorization.

158342251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245380.

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

The square root of 158342251 is about 12583.4117392701. The cubic root of 158342251 is about 541.0020841724.

It can be divided in two parts, 1583 and 42251, that added together give a palindrome (43834).

The spelling of 158342251 in words is "one hundred fifty-eight million, three hundred forty-two thousand, two hundred fifty-one".