1225633211 has 16 divisors (see below), whose sum is σ = 1359168768. Its totient is φ = 1095837600.

The previous prime is 1225633187. The next prime is 1225633229. The reversal of 1225633211 is 1123365221.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1225633211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225633261) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 759041 + ... + 760653.

It is an arithmetic number, because the mean of its divisors is an integer number (84948048).

Almost surely, 2^1225633211 is an apocalyptic number.

1225633211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1225633211 is a deficient number, since it is larger than the sum of its proper divisors (133535557).

1225633211 is a wasteful number, since it uses less digits than its factorization.

1225633211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2722.

The product of its digits is 2160, while the sum is 26.

The square root of 1225633211 is about 35009.0447027622. The cubic root of 1225633211 is about 1070.1718101260.

Adding to 1225633211 its reverse (1123365221), we get a palindrome (2348998432).

It can be divided in two parts, 1225 and 633211, that added together give a palindrome (634436).

The spelling of 1225633211 in words is "one billion, two hundred twenty-five million, six hundred thirty-three thousand, two hundred eleven".