1222263552 has 144 divisors (see below), whose sum is σ = 3470221440. Its totient is φ = 380583936.

The previous prime is 1222263541. The next prime is 1222263563. The reversal of 1222263552 is 2553622221.

It is an interprime number because it is at equal distance from previous prime (1222263541) and next prime (1222263563).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2336763 + ... + 2337285.

It is an arithmetic number, because the mean of its divisors is an integer number (24098760).

Almost surely, 2^1222263552 is an apocalyptic number.

1222263552 is a gapful number since it is divisible by the number (12) 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 1222263552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1735110720).

1222263552 is an abundant number, since it is smaller than the sum of its proper divisors (2247957888).

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

1222263552 is a wasteful number, since it uses less digits than its factorization.

1222263552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738 (or 724 counting only the distinct ones).

The product of its digits is 14400, while the sum is 30.

The square root of 1222263552 is about 34960.8860299621. The cubic root of 1222263552 is about 1069.1901613792.

Adding to 1222263552 its reverse (2553622221), we get a palindrome (3775885773).

The spelling of 1222263552 in words is "one billion, two hundred twenty-two million, two hundred sixty-three thousand, five hundred fifty-two".