20132231 has 8 divisors (see below), whose sum is σ = 23286144. Its totient is φ = 17047800.

The previous prime is 20132219. The next prime is 20132243. The reversal of 20132231 is 13223102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20132219) and next prime (20132243).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20132231 - 2¹⁰ = 20131207 is a prime.

It is a super-2 number, since 2×20132231² = 810613450074722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20132201) 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, 16745 + ... + 17906.

It is an arithmetic number, because the mean of its divisors is an integer number (2910768).

Almost surely, 2^20132231 is an apocalyptic number.

20132231 is a deficient number, since it is larger than the sum of its proper divisors (3153913).

20132231 is an equidigital number, since it uses as much as digits as its factorization.

20132231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34741.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 20132231 is about 4486.8954746016. The cubic root of 20132231 is about 272.0386650268.

Adding to 20132231 its reverse (13223102), we get a palindrome (33355333).

The spelling of 20132231 in words is "twenty million, one hundred thirty-two thousand, two hundred thirty-one".