4221320431 has 4 divisors (see below), whose sum is σ = 4227501672. Its totient is φ = 4215139192.

The previous prime is 4221320419. The next prime is 4221320483. The reversal of 4221320431 is 1340231224.

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

It is a cyclic number.

It is not a de Polignac number, because 4221320431 - 2²⁹ = 3684449519 is a prime.

It is a super-2 number, since 2×4221320431² = 35639092362356051522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221320401) 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, 3089596 + ... + 3090961.

It is an arithmetic number, because the mean of its divisors is an integer number (1056875418).

Almost surely, 2^4221320431 is an apocalyptic number.

4221320431 is a deficient number, since it is larger than the sum of its proper divisors (6181241).

4221320431 is an equidigital number, since it uses as much as digits as its factorization.

4221320431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6181240.

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

The square root of 4221320431 is about 64971.6894577938. The cubic root of 4221320431 is about 1616.1541183468.

Adding to 4221320431 its reverse (1340231224), we get a palindrome (5561551655).

The spelling of 4221320431 in words is "four billion, two hundred twenty-one million, three hundred twenty thousand, four hundred thirty-one".