53111232 has 168 divisors, whose sum is σ = 168005760. Its totient is φ = 15966720.

The previous prime is 53111203. The next prime is 53111237. The reversal of 53111232 is 23211135.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53111237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 251607 + ... + 251817.

Almost surely, 2^53111232 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 53111232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84002880).

53111232 is an abundant number, since it is smaller than the sum of its proper divisors (114894528).

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

53111232 is a wasteful number, since it uses less digits than its factorization.

53111232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271 (or 258 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 53111232 is about 7287.7453303474. The cubic root of 53111232 is about 375.8911711596.

Adding to 53111232 its reverse (23211135), we get a palindrome (76322367).

The spelling of 53111232 in words is "fifty-three million, one hundred eleven thousand, two hundred thirty-two".