52207220 has 24 divisors (see below), whose sum is σ = 118069224. Its totient is φ = 19276416.

The previous prime is 52207213. The next prime is 52207273. The reversal of 52207220 is 2270225.

It can be written as a sum of positive squares in 4 ways, for example, as 2137444 + 50069776 = 1462^2 + 7076^2 .

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 = 52207192 and 52207201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100139 + ... + 100658.

It is an arithmetic number, because the mean of its divisors is an integer number (4919551).

Almost surely, 2^52207220 is an apocalyptic number.

It is an amenable number.

52207220 is an abundant number, since it is smaller than the sum of its proper divisors (65862004).

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

52207220 is a wasteful number, since it uses less digits than its factorization.

52207220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200819 (or 200817 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 52207220 is about 7225.4563869696. The cubic root of 52207220 is about 373.7462604444.

Adding to 52207220 its reverse (2270225), we get a palindrome (54477445).

The spelling of 52207220 in words is "fifty-two million, two hundred seven thousand, two hundred twenty".