52220240 has 20 divisors (see below), whose sum is σ = 121412244. Its totient is φ = 20888064.

The previous prime is 52220219. The next prime is 52220249. The reversal of 52220240 is 4202225.

It can be written as a sum of positive squares in 2 ways, for example, as 14961424 + 37258816 = 3868^2 + 6104^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-3 number, since 3×52220240³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52220249) 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 3 ways as a sum of consecutive naturals, for example, 326297 + ... + 326456.

Almost surely, 2^52220240 is an apocalyptic number.

It is an amenable number.

52220240 is an abundant number, since it is smaller than the sum of its proper divisors (69192004).

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

52220240 is a wasteful number, since it uses less digits than its factorization.

52220240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652766 (or 652760 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 52220240 is about 7226.3573119519. The cubic root of 52220240 is about 373.7773274873. Note that the first 3 decimals are identical.

Adding to 52220240 its reverse (4202225), we get a palindrome (56422465).

The spelling of 52220240 in words is "fifty-two million, two hundred twenty thousand, two hundred forty".