236431 has 6 divisors (see below), whose sum is σ = 256200. Its totient is φ = 218088.

The previous prime is 236429. The next prime is 236449. The reversal of 236431 is 134632.

236431 = 196² + 197² + ... + 201².

It is not a de Polignac number, because 236431 - 2¹ = 236429 is a prime.

It is a super-2 number, since 2×236431² = 111799235522, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2 + 3¹⁰ + 4² + 6³ + 3¹¹ + 1 .

It is a Duffinian number.

236431 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 236399 and 236408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (236461) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 531 + ... + 868.

It is an arithmetic number, because the mean of its divisors is an integer number (42700).

2²³⁶⁴³¹ is an apocalyptic number.

236431 is a deficient number, since it is larger than the sum of its proper divisors (19769).

236431 is a wasteful number, since it uses less digits than its factorization.

236431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425 (or 1412 counting only the distinct ones).

The product of its digits is 432, while the sum is 19.

The square root of 236431 is about 486.2417094409. The cubic root of 236431 is about 61.8350628245.

The spelling of 236431 in words is "two hundred thirty-six thousand, four hundred thirty-one".