2031423421 has 4 divisors (see below), whose sum is σ = 2031728832. Its totient is φ = 2031118012.

The previous prime is 2031423391. The next prime is 2031423439. The reversal of 2031423421 is 1243241302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2031423421 - 2⁹ = 2031422909 is a prime.

It is a super-2 number, since 2×2031423421² = 8253362230774686482, 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 = 2031423392 and 2031423401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031421421) 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, 142501 + ... + 156106.

It is an arithmetic number, because the mean of its divisors is an integer number (507932208).

Almost surely, 2^2031423421 is an apocalyptic number.

It is an amenable number.

2031423421 is a deficient number, since it is larger than the sum of its proper divisors (305411).

2031423421 is an equidigital number, since it uses as much as digits as its factorization.

2031423421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305410.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 2031423421 is about 45071.3148354915. The cubic root of 2031423421 is about 1266.4852954146.

Adding to 2031423421 its reverse (1243241302), we get a palindrome (3274664723).

The spelling of 2031423421 in words is "two billion, thirty-one million, four hundred twenty-three thousand, four hundred twenty-one".