11531031252 has 96 divisors (see below), whose sum is σ = 30710534400. Its totient is φ = 3335964672.

The previous prime is 11531031247. The next prime is 11531031257. The reversal of 11531031252 is 25213013511.

It is an interprime number because it is at equal distance from previous prime (11531031247) and next prime (11531031257).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11531031257) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4133074 + ... + 4135862.

It is an arithmetic number, because the mean of its divisors is an integer number (319901400).

Almost surely, 2^11531031252 is an apocalyptic number.

11531031252 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 11531031252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15355267200).

11531031252 is an abundant number, since it is smaller than the sum of its proper divisors (19179503148).

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

11531031252 is a wasteful number, since it uses less digits than its factorization.

11531031252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4385 (or 4383 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

Adding to 11531031252 its reverse (25213013511), we get a palindrome (36744044763).

The spelling of 11531031252 in words is "eleven billion, five hundred thirty-one million, thirty-one thousand, two hundred fifty-two".