11143402452 has 144 divisors (see below), whose sum is σ = 35256574080. Its totient is φ = 2889057024.

The previous prime is 11143402451. The next prime is 11143402493. The reversal of 11143402452 is 25420434111.

It is a super-2 number, since 2×11143402452² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11143402451) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 164458 + ... + 222110.

It is an arithmetic number, because the mean of its divisors is an integer number (244837320).

Almost surely, 2^11143402452 is an apocalyptic number.

11143402452 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 11143402452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17628287040).

11143402452 is an abundant number, since it is smaller than the sum of its proper divisors (24113171628).

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

11143402452 is a wasteful number, since it uses less digits than its factorization.

11143402452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57742 (or 57737 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 11143402452 its reverse (25420434111), we get a palindrome (36563836563).

It can be divided in two parts, 11143 and 402452, that added together give a triangular number (413595 = T₉₀₉).

The spelling of 11143402452 in words is "eleven billion, one hundred forty-three million, four hundred two thousand, four hundred fifty-two".