158431 has 8 divisors (see below), whose sum is σ = 195104. Its totient is φ = 125280.

The previous prime is 158429. The next prime is 158443. The reversal of 158431 is 134851.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 158431 - 2¹ = 158429 is a prime.

It is a super-2 number, since 2×158431² = 50200763522, which contains 22 as substring.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 780 + ... + 961.

It is an arithmetic number, because the mean of its divisors is an integer number (24388).

2¹⁵⁸⁴³¹ is an apocalyptic number.

158431 is a deficient number, since it is larger than the sum of its proper divisors (36673).

158431 is a wasteful number, since it uses less digits than its factorization.

158431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761.

The product of its digits is 480, while the sum is 22.

The square root of 158431 is about 398.0339181527. The cubic root of 158431 is about 54.1103140431.

The spelling of 158431 in words is "one hundred fifty-eight thousand, four hundred thirty-one".