52440221549 has 2 divisors, whose sum is σ = 52440221550. Its totient is φ = 52440221548.

The previous prime is 52440221461. The next prime is 52440221557. The reversal of 52440221549 is 94512204425.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45036479524 + 7403742025 = 212218^2 + 86045^2 .

It is a cyclic number.

It is not a de Polignac number, because 52440221549 - 2³² = 48145254253 is a prime.

It is a super-2 number, since 2×52440221549² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52440221569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26220110774 + 26220110775.

It is an arithmetic number, because the mean of its divisors is an integer number (26220110775).

Almost surely, 2^52440221549 is an apocalyptic number.

It is an amenable number.

52440221549 is a deficient number, since it is larger than the sum of its proper divisors (1).

52440221549 is an equidigital number, since it uses as much as digits as its factorization.

52440221549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 115200, while the sum is 38.

The spelling of 52440221549 in words is "fifty-two billion, four hundred forty million, two hundred twenty-one thousand, five hundred forty-nine".