12227557 has 2 divisors, whose sum is σ = 12227558. Its totient is φ = 12227556.

The previous prime is 12227533. The next prime is 12227561. The reversal of 12227557 is 75572221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9821956 + 2405601 = 3134^2 + 1551^2 .

It is a cyclic number.

It is not a de Polignac number, because 12227557 - 2⁷ = 12227429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12227597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6113778 + 6113779.

It is an arithmetic number, because the mean of its divisors is an integer number (6113779).

Almost surely, 2^12227557 is an apocalyptic number.

It is an amenable number.

12227557 is a deficient number, since it is larger than the sum of its proper divisors (1).

12227557 is an equidigital number, since it uses as much as digits as its factorization.

12227557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9800, while the sum is 31.

The square root of 12227557 is about 3496.7923873173. The cubic root of 12227557 is about 230.3809502821.

Adding to 12227557 its reverse (75572221), we get a palindrome (87799778).

The spelling of 12227557 in words is "twelve million, two hundred twenty-seven thousand, five hundred fifty-seven".