22086557 has 2 divisors, whose sum is σ = 22086558. Its totient is φ = 22086556.

The previous prime is 22086551. The next prime is 22086593. The reversal of 22086557 is 75568022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14055001 + 8031556 = 3749^2 + 2834^2 .

It is a cyclic number.

It is not a de Polignac number, because 22086557 - 2²² = 17892253 is a prime.

It is a super-2 number, since 2×22086557² = 975632000228498, which contains 22 as substring.

It is a Chen prime.

It is equal to p_1394378 and since 22086557 and 1394378 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22086551) 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, 11043278 + 11043279.

It is an arithmetic number, because the mean of its divisors is an integer number (11043279).

Almost surely, 2^22086557 is an apocalyptic number.

It is an amenable number.

22086557 is a deficient number, since it is larger than the sum of its proper divisors (1).

22086557 is an equidigital number, since it uses as much as digits as its factorization.

22086557 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 35.

The square root of 22086557 is about 4699.6337091310. The cubic root of 22086557 is about 280.5709311459.

The spelling of 22086557 in words is "twenty-two million, eighty-six thousand, five hundred fifty-seven".