72261530 has 16 divisors (see below), whose sum is σ = 141895584. Its totient is φ = 26276880.

The previous prime is 72261517. The next prime is 72261551. The reversal of 72261530 is 3516227.

It is a self number, because there is not a number n which added to its sum of digits gives 72261530.

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, 328352 + ... + 328571.

It is an arithmetic number, because the mean of its divisors is an integer number (8868474).

Almost surely, 2^72261530 is an apocalyptic number.

72261530 is a deficient number, since it is larger than the sum of its proper divisors (69634054).

72261530 is a wasteful number, since it uses less digits than its factorization.

72261530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656941.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 72261530 is about 8500.6782082373. The cubic root of 72261530 is about 416.5198636612.

Adding to 72261530 its reverse (3516227), we get a palindrome (75777757).

The spelling of 72261530 in words is "seventy-two million, two hundred sixty-one thousand, five hundred thirty".