22308211538 has 6 divisors (see below), whose sum is σ = 33462634149. Its totient is φ = 11154000156.

The previous prime is 22308211507. The next prime is 22308211567. The reversal of 22308211538 is 83511280322.

It can be written as a sum of positive squares in 2 ways, for example, as 19389727009 + 2918484529 = 139247^2 + 54023^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=105613.

It is a super-3 number, since 3×22308211538³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22308211498 and 22308211507.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 158420 + ... + 264032.

Almost surely, 2^22308211538 is an apocalyptic number.

22308211538 is a deficient number, since it is larger than the sum of its proper divisors (11154422611).

22308211538 is an frugal number, since it uses more digits than its factorization.

22308211538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211228 (or 105615 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The spelling of 22308211538 in words is "twenty-two billion, three hundred eight million, two hundred eleven thousand, five hundred thirty-eight".