20140231 has 4 divisors (see below), whose sum is σ = 20159200. Its totient is φ = 20121264.

The previous prime is 20140213. The next prime is 20140243. The reversal of 20140231 is 13204102.

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 20140231 - 2¹⁵ = 20107463 is a prime.

It is a super-2 number, since 2×20140231² = 811257809466722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20140201) 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, 7791 + ... + 10048.

It is an arithmetic number, because the mean of its divisors is an integer number (5039800).

Almost surely, 2^20140231 is an apocalyptic number.

20140231 is a deficient number, since it is larger than the sum of its proper divisors (18969).

20140231 is a wasteful number, since it uses less digits than its factorization.

20140231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18968.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 20140231 is about 4487.7868710535. The cubic root of 20140231 is about 272.0746938391.

Adding to 20140231 its reverse (13204102), we get a palindrome (33344333).

The spelling of 20140231 in words is "twenty million, one hundred forty thousand, two hundred thirty-one".