22155043237 has 2 divisors, whose sum is σ = 22155043238. Its totient is φ = 22155043236.

The previous prime is 22155043201. The next prime is 22155043241. The reversal of 22155043237 is 73234055122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22069776481 + 85266756 = 148559^2 + 9234^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22155043237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22155043247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11077521618 + 11077521619.

It is an arithmetic number, because the mean of its divisors is an integer number (11077521619).

Almost surely, 2^22155043237 is an apocalyptic number.

It is an amenable number.

22155043237 is a deficient number, since it is larger than the sum of its proper divisors (1).

22155043237 is an equidigital number, since it uses as much as digits as its factorization.

22155043237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 34.

Adding to 22155043237 its reverse (73234055122), we get a palindrome (95389098359).

The spelling of 22155043237 in words is "twenty-two billion, one hundred fifty-five million, forty-three thousand, two hundred thirty-seven".