1225553117 has 2 divisors, whose sum is σ = 1225553118. Its totient is φ = 1225553116.

The previous prime is 1225553113. The next prime is 1225553201. The reversal of 1225553117 is 7113555221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 885003001 + 340550116 = 29749^2 + 18454^2 .

It is an emirp because it is prime and its reverse (7113555221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1225553117 - 2² = 1225553113 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225553111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612776558 + 612776559.

It is an arithmetic number, because the mean of its divisors is an integer number (612776559).

Almost surely, 2^1225553117 is an apocalyptic number.

It is an amenable number.

1225553117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225553117 is an equidigital number, since it uses as much as digits as its factorization.

1225553117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10500, while the sum is 32.

The square root of 1225553117 is about 35007.9007796811. The cubic root of 1225553117 is about 1070.1484980379.

The spelling of 1225553117 in words is "one billion, two hundred twenty-five million, five hundred fifty-three thousand, one hundred seventeen".