52071820 has 24 divisors (see below), whose sum is σ = 113122800. Its totient is φ = 20110272.

The previous prime is 52071787. The next prime is 52071821. The reversal of 52071820 is 2817025.

It is a super-2 number, since 2×52071820² = 5422948876224800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (52071821) 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, 44310 + ... + 45469.

It is an arithmetic number, because the mean of its divisors is an integer number (4713450).

Almost surely, 2^52071820 is an apocalyptic number.

It is an amenable number.

52071820 is an abundant number, since it is smaller than the sum of its proper divisors (61050980).

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

52071820 is a wasteful number, since it uses less digits than its factorization.

52071820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89817 (or 89815 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 52071820 is about 7216.0806536513. The cubic root of 52071820 is about 373.4228757016.

Adding to 52071820 its reverse (2817025), we get a palindrome (54888845).

The spelling of 52071820 in words is "fifty-two million, seventy-one thousand, eight hundred twenty".