1222153472 has 36 divisors (see below), whose sum is σ = 2450396256. Its totient is φ = 608355840.

The previous prime is 1222153451. The next prime is 1222153487. The reversal of 1222153472 is 2743512221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47597 + ... + 68627.

Almost surely, 2^1222153472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222153472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1225198128).

1222153472 is an abundant number, since it is smaller than the sum of its proper divisors (1228242784).

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

1222153472 is an equidigital number, since it uses as much as digits as its factorization.

1222153472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21274 (or 21260 counting only the distinct ones).

The product of its digits is 6720, while the sum is 29.

The square root of 1222153472 is about 34959.3116637041. The cubic root of 1222153472 is about 1069.1580624684.

Adding to 1222153472 its reverse (2743512221), we get a palindrome (3965665693).

The spelling of 1222153472 in words is "one billion, two hundred twenty-two million, one hundred fifty-three thousand, four hundred seventy-two".