52122640 has 40 divisors (see below), whose sum is σ = 124467480. Its totient is φ = 20284416.

The previous prime is 52122619. The next prime is 52122661. The reversal of 52122640 is 4622125.

It is an interprime number because it is at equal distance from previous prime (52122619) and next prime (52122661).

It can be written as a sum of positive squares in 4 ways, for example, as 20358144 + 31764496 = 4512^2 + 5636^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5845 + ... + 11764.

It is an arithmetic number, because the mean of its divisors is an integer number (3111687).

Almost surely, 2^52122640 is an apocalyptic number.

It is an amenable number.

52122640 is an abundant number, since it is smaller than the sum of its proper divisors (72344840).

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

52122640 is a wasteful number, since it uses less digits than its factorization.

52122640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17659 (or 17653 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 52122640 is about 7219.6010970136. The cubic root of 52122640 is about 373.5443181004.

Adding to 52122640 its reverse (4622125), we get a palindrome (56744765).

The spelling of 52122640 in words is "fifty-two million, one hundred twenty-two thousand, six hundred forty".