52213540 has 12 divisors (see below), whose sum is σ = 109648476. Its totient is φ = 20885408.

The previous prime is 52213537. The next prime is 52213559. The reversal of 52213540 is 4531225.

52213540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 21455424 + 30758116 = 4632^2 + 5546^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1305319 + ... + 1305358.

It is an arithmetic number, because the mean of its divisors is an integer number (9137373).

Almost surely, 2^52213540 is an apocalyptic number.

It is an amenable number.

52213540 is an abundant number, since it is smaller than the sum of its proper divisors (57434936).

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

52213540 is a wasteful number, since it uses less digits than its factorization.

52213540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2610686 (or 2610684 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 52213540 is about 7225.8937163509. The cubic root of 52213540 is about 373.7613412516.

Adding to 52213540 its reverse (4531225), we get a palindrome (56744765).

The spelling of 52213540 in words is "fifty-two million, two hundred thirteen thousand, five hundred forty".