20220517 has 2 divisors, whose sum is σ = 20220518. Its totient is φ = 20220516.

The previous prime is 20220467. The next prime is 20220581. The reversal of 20220517 is 71502202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19633761 + 586756 = 4431^2 + 766^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20220517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20220494 and 20220503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20220217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110258 + 10110259.

It is an arithmetic number, because the mean of its divisors is an integer number (10110259).

Almost surely, 2^20220517 is an apocalyptic number.

It is an amenable number.

20220517 is a deficient number, since it is larger than the sum of its proper divisors (1).

20220517 is an equidigital number, since it uses as much as digits as its factorization.

20220517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 20220517 is about 4496.7229178592. The cubic root of 20220517 is about 272.4357427818.

Adding to 20220517 its reverse (71502202), we get a palindrome (91722719).

The spelling of 20220517 in words is "twenty million, two hundred twenty thousand, five hundred seventeen".