52222220 has 12 divisors (see below), whose sum is σ = 109666704. Its totient is φ = 20888880.

The previous prime is 52222199. The next prime is 52222223. The reversal of 52222220 is 2222225.

It is a happy number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (52222223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1305536 + ... + 1305575.

It is an arithmetic number, because the mean of its divisors is an integer number (9138892).

Almost surely, 2^52222220 is an apocalyptic number.

It is an amenable number.

52222220 is an abundant number, since it is smaller than the sum of its proper divisors (57444484).

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

52222220 is a wasteful number, since it uses less digits than its factorization.

52222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2611120 (or 2611118 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 52222220 is about 7226.4943091377. The cubic root of 52222220 is about 373.7820515162.

Adding to 52222220 its reverse (2222225), we get a palindrome (54444445).

The spelling of 52222220 in words is "fifty-two million, two hundred twenty-two thousand, two hundred twenty".