20112231 has 8 divisors (see below), whose sum is σ = 27082224. Its totient is φ = 13275200.

The previous prime is 20112229. The next prime is 20112233. The reversal of 20112231 is 13221102.

It is an interprime number because it is at equal distance from previous prime (20112229) and next prime (20112233).

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 20112231 - 2¹ = 20112229 is a prime.

It is a super-2 number, since 2×20112231² = 809003671594722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112233) 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, 32886 + ... + 33491.

It is an arithmetic number, because the mean of its divisors is an integer number (3385278).

Almost surely, 2^20112231 is an apocalyptic number.

20112231 is a deficient number, since it is larger than the sum of its proper divisors (6969993).

20112231 is a wasteful number, since it uses less digits than its factorization.

20112231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66481.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 20112231 is about 4484.6662083147. Note that the first 3 decimals coincide. The cubic root of 20112231 is about 271.9485512192.

Adding to 20112231 its reverse (13221102), we get a palindrome (33333333).

The spelling of 20112231 in words is "twenty million, one hundred twelve thousand, two hundred thirty-one".