20032231 has 8 divisors (see below), whose sum is σ = 21184128. Its totient is φ = 18912000.

The previous prime is 20032193. The next prime is 20032237. The reversal of 20032231 is 13223002.

It is a happy number.

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 20032231 - 2¹¹ = 20030183 is a prime.

It is a super-2 number, since 2×20032231² = 802580557674722, 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 (20032237) 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, 6610 + ... + 9151.

It is an arithmetic number, because the mean of its divisors is an integer number (2648016).

Almost surely, 2^20032231 is an apocalyptic number.

20032231 is a deficient number, since it is larger than the sum of its proper divisors (1151897).

20032231 is a wasteful number, since it uses less digits than its factorization.

20032231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15833.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 20032231 is about 4475.7380396980. The cubic root of 20032231 is about 271.5874973910.

Adding to 20032231 its reverse (13223002), we get a palindrome (33255233).

The spelling of 20032231 in words is "twenty million, thirty-two thousand, two hundred thirty-one".