52117660 has 24 divisors (see below), whose sum is σ = 125082720. Its totient is φ = 17868864.

The previous prime is 52117619. The next prime is 52117661. The reversal of 52117660 is 6671125.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52117661) 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 7 ways as a sum of consecutive naturals, for example, 185995 + ... + 186274.

It is an arithmetic number, because the mean of its divisors is an integer number (5211780).

Almost surely, 2^52117660 is an apocalyptic number.

It is an amenable number.

52117660 is an abundant number, since it is smaller than the sum of its proper divisors (72965060).

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

52117660 is a wasteful number, since it uses less digits than its factorization.

52117660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372285 (or 372283 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 52117660 is about 7219.2561943735. The cubic root of 52117660 is about 373.5324210952.

Adding to 52117660 its reverse (6671125), we get a palindrome (58788785).

It can be divided in two parts, 521 and 17660, that added together give a palindrome (18181).

The spelling of 52117660 in words is "fifty-two million, one hundred seventeen thousand, six hundred sixty".