22285121557 has 2 divisors, whose sum is σ = 22285121558. Its totient is φ = 22285121556.

The previous prime is 22285121549. The next prime is 22285121587. The reversal of 22285121557 is 75512158222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14008852881 + 8276268676 = 118359^2 + 90974^2 .

It is a cyclic number.

It is not a de Polignac number, because 22285121557 - 2³ = 22285121549 is a prime.

It is a super-2 number, since 2×22285121557² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22285121587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11142560778 + 11142560779.

It is an arithmetic number, because the mean of its divisors is an integer number (11142560779).

Almost surely, 2^22285121557 is an apocalyptic number.

It is an amenable number.

22285121557 is a deficient number, since it is larger than the sum of its proper divisors (1).

22285121557 is an equidigital number, since it uses as much as digits as its factorization.

22285121557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112000, while the sum is 40.

Adding to 22285121557 its reverse (75512158222), we get a palindrome (97797279779).

The spelling of 22285121557 in words is "twenty-two billion, two hundred eighty-five million, one hundred twenty-one thousand, five hundred fifty-seven".