72021500 has 48 divisors (see below), whose sum is σ = 162751680. Its totient is φ = 27809600.

The previous prime is 72021493. The next prime is 72021527. The reversal of 72021500 is 512027.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12017 + ... + 16983.

It is an arithmetic number, because the mean of its divisors is an integer number (3390660).

Almost surely, 2^72021500 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 72021500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81375840).

72021500 is an abundant number, since it is smaller than the sum of its proper divisors (90730180).

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

72021500 is a wasteful number, since it uses less digits than its factorization.

72021500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5015 (or 5003 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 72021500 is about 8486.5481793247. The cubic root of 72021500 is about 416.0581695654.

Adding to 72021500 its reverse (512027), we get a palindrome (72533527).

The spelling of 72021500 in words is "seventy-two million, twenty-one thousand, five hundred".