158203 has 4 divisors (see below), whose sum is σ = 159048. Its totient is φ = 157360.

The previous prime is 158201. The next prime is 158209. The reversal of 158203 is 302851.

It is a happy number.

158203 is nontrivially palindromic in base 12.

158203 is a nontrivial binomial coefficient, being equal to C(563, 2).

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 158203 - 2¹ = 158201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158201) 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, 1 + ... + 562.

It is an arithmetic number, because the mean of its divisors is an integer number (39762).

2¹⁵⁸²⁰³ is an apocalyptic number.

158203 is the 562-nd triangular number.

158203 is the 188-th centered nonagonal number.

158203 is a deficient number, since it is larger than the sum of its proper divisors (845).

158203 is an equidigital number, since it uses as much as digits as its factorization.

158203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 158203 is about 397.7474072826. The cubic root of 158203 is about 54.0843446421.

It can be divided in two parts, 158 and 203, that added together give a square (361 = 19²).

The spelling of 158203 in words is "one hundred fifty-eight thousand, two hundred three".