20231232231 has 16 divisors (see below), whose sum is σ = 30872544768. Its totient is φ = 11544204000.

The previous prime is 20231232227. The next prime is 20231232233. The reversal of 20231232231 is 13223213202.

It is a happy number.

It is not a de Polignac number, because 20231232231 - 2² = 20231232227 is a prime.

It is a super-2 number, since 2×20231232231² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 20231232198 and 20231232207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20231232233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 672435 + ... + 701876.

It is an arithmetic number, because the mean of its divisors is an integer number (1929534048).

Almost surely, 2^20231232231 is an apocalyptic number.

20231232231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20231232231 is a deficient number, since it is larger than the sum of its proper divisors (10641312537).

20231232231 is a wasteful number, since it uses less digits than its factorization.

20231232231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375022.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20231232231 its reverse (13223213202), we get a palindrome (33454445433).

The spelling of 20231232231 in words is "twenty billion, two hundred thirty-one million, two hundred thirty-two thousand, two hundred thirty-one".