52001620 has 96 divisors (see below), whose sum is σ = 127733760. Its totient is φ = 17592960.

The previous prime is 52001617. The next prime is 52001641. The reversal of 52001620 is 2610025.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 52001594 and 52001603.

It is a congruent number.

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, 217461 + ... + 217699.

It is an arithmetic number, because the mean of its divisors is an integer number (1330560).

Almost surely, 2^52001620 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 52001620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63866880).

52001620 is an abundant number, since it is smaller than the sum of its proper divisors (75732140).

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

52001620 is a wasteful number, since it uses less digits than its factorization.

52001620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 52001620 is about 7211.2148768429. The cubic root of 52001620 is about 373.2549917108.

Adding to 52001620 its reverse (2610025), we get a palindrome (54611645).

The spelling of 52001620 in words is "fifty-two million, one thousand, six hundred twenty".