1227227557 has 2 divisors, whose sum is σ = 1227227558. Its totient is φ = 1227227556.

The previous prime is 1227227549. The next prime is 1227227563. The reversal of 1227227557 is 7557227221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1025984961 + 201242596 = 32031^2 + 14186^2 .

It is a cyclic number.

It is not a de Polignac number, because 1227227557 - 2³ = 1227227549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1227227527) 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, 613613778 + 613613779.

It is an arithmetic number, because the mean of its divisors is an integer number (613613779).

Almost surely, 2^1227227557 is an apocalyptic number.

It is an amenable number.

1227227557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1227227557 is an equidigital number, since it uses as much as digits as its factorization.

1227227557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 137200, while the sum is 40.

The square root of 1227227557 is about 35031.8077894933. The cubic root of 1227227557 is about 1070.6356478727.

The spelling of 1227227557 in words is "one billion, two hundred twenty-seven million, two hundred twenty-seven thousand, five hundred fifty-seven".