52351220 has 48 divisors (see below), whose sum is σ = 116363520. Its totient is φ = 19742976.

The previous prime is 52351217. The next prime is 52351223. The reversal of 52351220 is 2215325.

It is an interprime number because it is at equal distance from previous prime (52351217) and next prime (52351223).

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 = 52351192 and 52351201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52351223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32801 + ... + 34359.

It is an arithmetic number, because the mean of its divisors is an integer number (2424240).

Almost surely, 2^52351220 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 52351220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58181760).

52351220 is an abundant number, since it is smaller than the sum of its proper divisors (64012300).

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

52351220 is a wasteful number, since it uses less digits than its factorization.

52351220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1664 (or 1662 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 52351220 is about 7235.4142935978. The cubic root of 52351220 is about 374.0895721860.

Adding to 52351220 its reverse (2215325), we get a palindrome (54566545).

The spelling of 52351220 in words is "fifty-two million, three hundred fifty-one thousand, two hundred twenty".