52231620 has 96 divisors (see below), whose sum is σ = 174440448. Its totient is φ = 11417472.

The previous prime is 52231607. The next prime is 52231631. The reversal of 52231620 is 2613225.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6957 + ... + 12363.

It is an arithmetic number, because the mean of its divisors is an integer number (1817088).

Almost surely, 2^52231620 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 52231620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87220224).

52231620 is an abundant number, since it is smaller than the sum of its proper divisors (122208828).

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

52231620 is a wasteful number, since it uses less digits than its factorization.

52231620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5449 (or 5447 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 52231620 is about 7227.1446643886. The cubic root of 52231620 is about 373.8044770947.

Adding to 52231620 its reverse (2613225), we get a palindrome (54844845).

The spelling of 52231620 in words is "fifty-two million, two hundred thirty-one thousand, six hundred twenty".