56220042517 has 2 divisors, whose sum is σ = 56220042518. Its totient is φ = 56220042516.

The previous prime is 56220042481. The next prime is 56220042523. The reversal of 56220042517 is 71524002265.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53939598001 + 2280444516 = 232249^2 + 47754^2 .

It is a cyclic number.

It is not a de Polignac number, because 56220042517 - 2¹¹ = 56220040469 is a prime.

It is a super-2 number, since 2×56220042517² (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 (56220042577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28110021258 + 28110021259.

It is an arithmetic number, because the mean of its divisors is an integer number (28110021259).

Almost surely, 2^56220042517 is an apocalyptic number.

It is an amenable number.

56220042517 is a deficient number, since it is larger than the sum of its proper divisors (1).

56220042517 is an equidigital number, since it uses as much as digits as its factorization.

56220042517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33600, while the sum is 34.

The spelling of 56220042517 in words is "fifty-six billion, two hundred twenty million, forty-two thousand, five hundred seventeen".