52101640 has 32 divisors (see below), whose sum is σ = 117454680. Its totient is φ = 20800512.

The previous prime is 52101631. The next prime is 52101649. The reversal of 52101640 is 4610125.

It is an interprime number because it is at equal distance from previous prime (52101631) and next prime (52101649).

It can be written as a sum of positive squares in 4 ways, for example, as 51065316 + 1036324 = 7146^2 + 1018^2 .

It is not an unprimeable number, because it can be changed into a prime (52101649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28432 + ... + 30208.

Almost surely, 2^52101640 is an apocalyptic number.

It is an amenable number.

52101640 is an abundant number, since it is smaller than the sum of its proper divisors (65353040).

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

52101640 is a wasteful number, since it uses less digits than its factorization.

52101640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2521 (or 2517 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 52101640 is about 7218.1465765112. The cubic root of 52101640 is about 373.4941448653.

Adding to 52101640 its reverse (4610125), we get a palindrome (56711765).

The spelling of 52101640 in words is "fifty-two million, one hundred one thousand, six hundred forty".