22553544397 has 2 divisors, whose sum is σ = 22553544398. Its totient is φ = 22553544396.

The previous prime is 22553544347. The next prime is 22553544463. The reversal of 22553544397 is 79344535522.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11487766761 + 11065777636 = 107181^2 + 105194^2 .

It is a cyclic number.

It is not a de Polignac number, because 22553544397 - 2¹⁹ = 22553020109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22553544397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22553544347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11276772198 + 11276772199.

It is an arithmetic number, because the mean of its divisors is an integer number (11276772199).

Almost surely, 2^22553544397 is an apocalyptic number.

It is an amenable number.

22553544397 is a deficient number, since it is larger than the sum of its proper divisors (1).

22553544397 is an equidigital number, since it uses as much as digits as its factorization.

22553544397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536000, while the sum is 49.

The spelling of 22553544397 in words is "twenty-two billion, five hundred fifty-three million, five hundred forty-four thousand, three hundred ninety-seven".