22256431633 has 4 divisors (see below), whose sum is σ = 22258197220. Its totient is φ = 22254666048.

The previous prime is 22256431591. The next prime is 22256431651. The reversal of 22256431633 is 33613465222.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12876121729 + 9380309904 = 113473^2 + 96852^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22256431633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22256431592 and 22256431601.

It is not an unprimeable number, because it can be changed into a prime (22256431693) 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, 863748 + ... + 889141.

It is an arithmetic number, because the mean of its divisors is an integer number (5564549305).

Almost surely, 2^22256431633 is an apocalyptic number.

It is an amenable number.

22256431633 is a deficient number, since it is larger than the sum of its proper divisors (1765587).

22256431633 is a wasteful number, since it uses less digits than its factorization.

22256431633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1765586.

The product of its digits is 155520, while the sum is 37.

Adding to 22256431633 its reverse (33613465222), we get a palindrome (55869896855).

The spelling of 22256431633 in words is "twenty-two billion, two hundred fifty-six million, four hundred thirty-one thousand, six hundred thirty-three".