20242231 has 4 divisors (see below), whose sum is σ = 21122352. Its totient is φ = 19362112.

The previous prime is 20242213. The next prime is 20242247. The reversal of 20242231 is 13224202.

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 20242231 - 2⁵ = 20242199 is a prime.

It is a super-2 number, since 2×20242231² = 819495831714722, 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 (20242031) 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, 440026 + ... + 440071.

It is an arithmetic number, because the mean of its divisors is an integer number (5280588).

Almost surely, 2^20242231 is an apocalyptic number.

20242231 is a deficient number, since it is larger than the sum of its proper divisors (880121).

20242231 is an equidigital number, since it uses as much as digits as its factorization.

20242231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880120.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 20242231 is about 4499.1366949672. The cubic root of 20242231 is about 272.5332271578.

Adding to 20242231 its reverse (13224202), we get a palindrome (33466433).

The spelling of 20242231 in words is "twenty million, two hundred forty-two thousand, two hundred thirty-one".