1222513240 has 64 divisors (see below), whose sum is σ = 3025330560. Its totient is φ = 441776640.

The previous prime is 1222513223. The next prime is 1222513291. The reversal of 1222513240 is 423152221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 571 + ... + 49450.

It is an arithmetic number, because the mean of its divisors is an integer number (47270790).

Almost surely, 2^1222513240 is an apocalyptic number.

1222513240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222513240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1512665280).

1222513240 is an abundant number, since it is smaller than the sum of its proper divisors (1802817320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1222513240 is a wasteful number, since it uses less digits than its factorization.

1222513240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50092 (or 50088 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1222513240 is about 34964.4568097375. The cubic root of 1222513240 is about 1069.2629623110.

Adding to 1222513240 its reverse (423152221), we get a palindrome (1645665461).

The spelling of 1222513240 in words is "one billion, two hundred twenty-two million, five hundred thirteen thousand, two hundred forty".