11531232252 has 120 divisors (see below), whose sum is σ = 31516612512. Its totient is φ = 3669494400.

The previous prime is 11531232241. The next prime is 11531232263. The reversal of 11531232252 is 25223213511.

It is an interprime number because it is at equal distance from previous prime (11531232241) and next prime (11531232263).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4924602 + ... + 4926942.

Almost surely, 2^11531232252 is an apocalyptic number.

11531232252 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 11531232252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15758306256).

11531232252 is an abundant number, since it is smaller than the sum of its proper divisors (19985380260).

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

11531232252 is a wasteful number, since it uses less digits than its factorization.

11531232252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3041 (or 3030 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

Adding to 11531232252 its reverse (25223213511), we get a palindrome (36754445763).

The spelling of 11531232252 in words is "eleven billion, five hundred thirty-one million, two hundred thirty-two thousand, two hundred fifty-two".