72223003540 has 24 divisors (see below), whose sum is σ = 154529975880. Its totient is φ = 28344121728.

The previous prime is 72223003483. The next prime is 72223003577. The reversal of 72223003540 is 4530032227.

It can be written as a sum of positive squares in 4 ways, for example, as 2279680516 + 69943323024 = 47746^2 + 264468^2 .

It is a junction number, because it is equal to n+sod(n) for n = 72223003499 and 72223003508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34066395 + ... + 34068514.

It is an arithmetic number, because the mean of its divisors is an integer number (6438748995).

Almost surely, 2^72223003540 is an apocalyptic number.

It is an amenable number.

72223003540 is an abundant number, since it is smaller than the sum of its proper divisors (82306972340).

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

72223003540 is a wasteful number, since it uses less digits than its factorization.

72223003540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68134971 (or 68134969 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 28.

Adding to 72223003540 its reverse (4530032227), we get a palindrome (76753035767).

The spelling of 72223003540 in words is "seventy-two billion, two hundred twenty-three million, three thousand, five hundred forty".