52031520 has 144 divisors (see below), whose sum is σ = 185395392. Its totient is φ = 13263360.

The previous prime is 52031513. The next prime is 52031521. The reversal of 52031520 is 2513025.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is a junction number, because it is equal to n+sod(n) for n = 52031493 and 52031502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52031521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32335 + ... + 33905.

It is an arithmetic number, because the mean of its divisors is an integer number (1287468).

Almost surely, 2^52031520 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 52031520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92697696).

52031520 is an abundant number, since it is smaller than the sum of its proper divisors (133363872).

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

52031520 is a wasteful number, since it uses less digits than its factorization.

52031520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1615 (or 1604 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 52031520 is about 7213.2877386113. The cubic root of 52031520 is about 373.3265163154.

Adding to 52031520 its reverse (2513025), we get a palindrome (54544545).

The spelling of 52031520 in words is "fifty-two million, thirty-one thousand, five hundred twenty".