22215400443 has 24 divisors (see below), whose sum is σ = 33291167728. Its totient is φ = 14804135424.

The previous prime is 22215400423. The next prime is 22215400453. The reversal of 22215400443 is 34400451222.

22215400443 is a `hidden beast` number, since 2 + 2 + 215 + 4 + 0 + 0 + 443 = 666.

It is not a de Polignac number, because 22215400443 - 2⁸ = 22215400187 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22215400423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 612471 + ... + 647727.

Almost surely, 2^22215400443 is an apocalyptic number.

22215400443 is a deficient number, since it is larger than the sum of its proper divisors (11075767285).

22215400443 is an equidigital number, since it uses as much as digits as its factorization.

22215400443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37865 (or 37853 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 22215400443 its reverse (34400451222), we get a palindrome (56615851665).

The spelling of 22215400443 in words is "twenty-two billion, two hundred fifteen million, four hundred thousand, four hundred forty-three".