21431430222 has 96 divisors (see below), whose sum is σ = 48621019392. Its totient is φ = 6281189376.

The previous prime is 21431430211. The next prime is 21431430253. The reversal of 21431430222 is 22203413412.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21431430192 and 21431430201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1708678 + ... + 1721174.

It is an arithmetic number, because the mean of its divisors is an integer number (506468952).

Almost surely, 2^21431430222 is an apocalyptic number.

21431430222 is an abundant number, since it is smaller than the sum of its proper divisors (27189589170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21431430222 is a wasteful number, since it uses less digits than its factorization.

21431430222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12602 (or 12585 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21431430222 its reverse (22203413412), we get a palindrome (43634843634).

The spelling of 21431430222 in words is "twenty-one billion, four hundred thirty-one million, four hundred thirty thousand, two hundred twenty-two".