1214225565 has 32 divisors (see below), whose sum is σ = 2224644096. Its totient is φ = 553988160.

The previous prime is 1214225549. The next prime is 1214225611. The reversal of 1214225565 is 5655224121.

It is not a de Polignac number, because 1214225565 - 2⁴ = 1214225549 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43860 + ... + 65970.

It is an arithmetic number, because the mean of its divisors is an integer number (69520128).

Almost surely, 2^1214225565 is an apocalyptic number.

1214225565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1214225565 is a deficient number, since it is larger than the sum of its proper divisors (1010418531).

1214225565 is a wasteful number, since it uses less digits than its factorization.

1214225565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22649.

The product of its digits is 24000, while the sum is 33.

The square root of 1214225565 is about 34845.7395530644. The cubic root of 1214225565 is about 1066.8412285383.

Adding to 1214225565 its reverse (5655224121), we get a palindrome (6869449686).

The spelling of 1214225565 in words is "one billion, two hundred fourteen million, two hundred twenty-five thousand, five hundred sixty-five".