52213440 has 112 divisors (see below), whose sum is σ = 167408352. Its totient is φ = 13787136.

The previous prime is 52213439. The next prime is 52213531. The reversal of 52213440 is 4431225.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131322 + ... + 131718.

Almost surely, 2^52213440 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 52213440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83704176).

52213440 is an abundant number, since it is smaller than the sum of its proper divisors (115194912).

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

52213440 is a wasteful number, since it uses less digits than its factorization.

52213440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554 (or 544 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 52213440 is about 7225.8867967883. The cubic root of 52213440 is about 373.7611026407.

Adding to 52213440 its reverse (4431225), we get a palindrome (56644665).

The spelling of 52213440 in words is "fifty-two million, two hundred thirteen thousand, four hundred forty".