52097220 has 144 divisors (see below), whose sum is σ = 182407680. Its totient is φ = 11789568.

The previous prime is 52097207. The next prime is 52097239. The reversal of 52097220 is 2279025.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 217861 + ... + 218099.

It is an arithmetic number, because the mean of its divisors is an integer number (1266720).

Almost surely, 2^52097220 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 52097220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91203840).

52097220 is an abundant number, since it is smaller than the sum of its proper divisors (130310460).

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

52097220 is a wasteful number, since it uses less digits than its factorization.

52097220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 52097220 is about 7217.8403972379. The cubic root of 52097220 is about 373.4835828765.

The spelling of 52097220 in words is "fifty-two million, ninety-seven thousand, two hundred twenty".