52211720 has 64 divisors (see below), whose sum is σ = 129470400. Its totient is φ = 18791680.

The previous prime is 52211707. The next prime is 52211741. The reversal of 52211720 is 2711225.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 52211692 and 52211701.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46526 + ... + 47634.

It is an arithmetic number, because the mean of its divisors is an integer number (2022975).

Almost surely, 2^52211720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52211720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64735200).

52211720 is an abundant number, since it is smaller than the sum of its proper divisors (77258680).

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

52211720 is a wasteful number, since it uses less digits than its factorization.

52211720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238 (or 1234 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 52211720 is about 7225.7677792744. The cubic root of 52211720 is about 373.7569984857.

Adding to 52211720 its reverse (2711225), we get a palindrome (54922945).

The spelling of 52211720 in words is "fifty-two million, two hundred eleven thousand, seven hundred twenty".