722021321431 has 4 divisors (see below), whose sum is σ = 723587528664. Its totient is φ = 720455114200.

The previous prime is 722021321423. The next prime is 722021321459. The reversal of 722021321431 is 134123120227.

722021321431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 722021321431 - 2³ = 722021321423 is a prime.

It is a super-2 number, since 2×722021321431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 722021321431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722021321491) 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, 783102925 + ... + 783103846.

It is an arithmetic number, because the mean of its divisors is an integer number (180896882166).

Almost surely, 2^722021321431 is an apocalyptic number.

722021321431 is a deficient number, since it is larger than the sum of its proper divisors (1566207233).

722021321431 is a wasteful number, since it uses less digits than its factorization.

722021321431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1566207232.

The product of its (nonzero) digits is 4032, while the sum is 28.

Adding to 722021321431 its reverse (134123120227), we get a palindrome (856144441658).

The spelling of 722021321431 in words is "seven hundred twenty-two billion, twenty-one million, three hundred twenty-one thousand, four hundred thirty-one".