11311217472 has 112 divisors (see below), whose sum is σ = 31625072640. Its totient is φ = 3560713728.

The previous prime is 11311217453. The next prime is 11311217501. The reversal of 11311217472 is 27471211311.

It is a congruent number.

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, 332653 + ... + 365075.

It is an arithmetic number, because the mean of its divisors is an integer number (282366720).

Almost surely, 2^11311217472 is an apocalyptic number.

11311217472 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 11311217472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15812536320).

11311217472 is an abundant number, since it is smaller than the sum of its proper divisors (20313855168).

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

11311217472 is a wasteful number, since it uses less digits than its factorization.

11311217472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32540 (or 32530 counting only the distinct ones).

The product of its digits is 2352, while the sum is 30.

Adding to 11311217472 its reverse (27471211311), we get a palindrome (38782428783).

The spelling of 11311217472 in words is "eleven billion, three hundred eleven million, two hundred seventeen thousand, four hundred seventy-two".