1217822225 has 12 divisors (see below), whose sum is σ = 1510558080. Its totient is φ = 973962000.

The previous prime is 1217822173. The next prime is 1217822237. The reversal of 1217822225 is 5222287121.

It is not a de Polignac number, because 1217822225 - 2¹⁰ = 1217821201 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1217822191 and 1217822200.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118856 + ... + 128694.

It is an arithmetic number, because the mean of its divisors is an integer number (125879840).

Almost surely, 2^1217822225 is an apocalyptic number.

It is an amenable number.

1217822225 is a deficient number, since it is larger than the sum of its proper divisors (292735855).

1217822225 is an equidigital number, since it uses as much as digits as its factorization.

1217822225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14800 (or 14795 counting only the distinct ones).

The product of its digits is 8960, while the sum is 32.

The square root of 1217822225 is about 34897.3097100622. The cubic root of 1217822225 is about 1067.8935543754.

The spelling of 1217822225 in words is "one billion, two hundred seventeen million, eight hundred twenty-two thousand, two hundred twenty-five".