52223220 has 216 divisors, whose sum is σ = 191213568. Its totient is φ = 11491200.

The previous prime is 52223207. The next prime is 52223239. The reversal of 52223220 is 2232225.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 52223193 and 52223202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 273325 + ... + 273515.

It is an arithmetic number, because the mean of its divisors is an integer number (885248).

Almost surely, 2^52223220 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 52223220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95606784).

52223220 is an abundant number, since it is smaller than the sum of its proper divisors (138990348).

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

52223220 is a wasteful number, since it uses less digits than its factorization.

52223220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 52223220 is about 7226.5634986486. The cubic root of 52223220 is about 373.7844373439.

Adding to 52223220 its reverse (2232225), we get a palindrome (54455445).

The spelling of 52223220 in words is "fifty-two million, two hundred twenty-three thousand, two hundred twenty".