2223221557 has 2 divisors, whose sum is σ = 2223221558. Its totient is φ = 2223221556.

The previous prime is 2223221549. The next prime is 2223221569. The reversal of 2223221557 is 7551223222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1687484241 + 535737316 = 41079^2 + 23146^2 .

It is a cyclic number.

It is not a de Polignac number, because 2223221557 - 2³ = 2223221549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2223221527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1111610778 + 1111610779.

It is an arithmetic number, because the mean of its divisors is an integer number (1111610779).

Almost surely, 2^2223221557 is an apocalyptic number.

It is an amenable number.

2223221557 is a deficient number, since it is larger than the sum of its proper divisors (1).

2223221557 is an equidigital number, since it uses as much as digits as its factorization.

2223221557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 31.

The square root of 2223221557 is about 47151.0504336860. The cubic root of 2223221557 is about 1305.1514642437.

Adding to 2223221557 its reverse (7551223222), we get a palindrome (9774444779).

The spelling of 2223221557 in words is "two billion, two hundred twenty-three million, two hundred twenty-one thousand, five hundred fifty-seven".