4031311421 has 4 divisors (see below), whose sum is σ = 4039728000. Its totient is φ = 4022894844.

The previous prime is 4031311399. The next prime is 4031311423. The reversal of 4031311421 is 1241131304.

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 a de Polignac number, because none of the positive numbers 2^k-4031311421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4031311393 and 4031311402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4031311423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4207571 + ... + 4208528.

It is an arithmetic number, because the mean of its divisors is an integer number (1009932000).

Almost surely, 2^4031311421 is an apocalyptic number.

It is an amenable number.

4031311421 is a deficient number, since it is larger than the sum of its proper divisors (8416579).

4031311421 is an equidigital number, since it uses as much as digits as its factorization.

4031311421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8416578.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 4031311421 is about 63492.6091840617. The cubic root of 4031311421 is about 1591.5322729992.

Adding to 4031311421 its reverse (1241131304), we get a palindrome (5272442725).

The spelling of 4031311421 in words is "four billion, thirty-one million, three hundred eleven thousand, four hundred twenty-one".