158724231 has 4 divisors (see below), whose sum is σ = 211632312. Its totient is φ = 105816152.

The previous prime is 158724199. The next prime is 158724259. The reversal of 158724231 is 132427851.

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 158724231 - 2⁵ = 158724199 is a prime.

It is a super-2 number, since 2×158724231² = 50386763013082722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 158724192 and 158724201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158724031) 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, 26454036 + ... + 26454041.

It is an arithmetic number, because the mean of its divisors is an integer number (52908078).

Almost surely, 2^158724231 is an apocalyptic number.

158724231 is a deficient number, since it is larger than the sum of its proper divisors (52908081).

158724231 is an equidigital number, since it uses as much as digits as its factorization.

158724231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52908080.

The product of its digits is 13440, while the sum is 33.

The square root of 158724231 is about 12598.5805152803. The cubic root of 158724231 is about 541.4367671108.

The spelling of 158724231 in words is "one hundred fifty-eight million, seven hundred twenty-four thousand, two hundred thirty-one".