2123403231 has 4 divisors (see below), whose sum is σ = 2831204312. Its totient is φ = 1415602152.

The previous prime is 2123403221. The next prime is 2123403239. The reversal of 2123403231 is 1323043212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2123403231 - 2¹⁵ = 2123370463 is a prime.

It is a super-2 number, since 2×2123403231² = 9017682562842478722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2123403198 and 2123403207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123403239) 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, 353900536 + ... + 353900541.

It is an arithmetic number, because the mean of its divisors is an integer number (707801078).

Almost surely, 2^2123403231 is an apocalyptic number.

2123403231 is a deficient number, since it is larger than the sum of its proper divisors (707801081).

2123403231 is an equidigital number, since it uses as much as digits as its factorization.

2123403231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707801080.

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

The square root of 2123403231 is about 46080.3996401941. The cubic root of 2123403231 is about 1285.3186956002.

Adding to 2123403231 its reverse (1323043212), we get a palindrome (3446446443).

The spelling of 2123403231 in words is "two billion, one hundred twenty-three million, four hundred three thousand, two hundred thirty-one".