72305525 has 6 divisors (see below), whose sum is σ = 89658882. Its totient is φ = 57844400.

The previous prime is 72305521. The next prime is 72305531. The reversal of 72305525 is 52550327.

It can be written as a sum of positive squares in 3 ways, for example, as 361201 + 71944324 = 601^2 + 8482^2 .

It is not a de Polignac number, because 72305525 - 2² = 72305521 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72305521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1446086 + ... + 1446135.

It is an arithmetic number, because the mean of its divisors is an integer number (14943147).

Almost surely, 2^72305525 is an apocalyptic number.

It is an amenable number.

72305525 is a deficient number, since it is larger than the sum of its proper divisors (17353357).

72305525 is a wasteful number, since it uses less digits than its factorization.

72305525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2892231 (or 2892226 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 29.

The square root of 72305525 is about 8503.2655491876. The cubic root of 72305525 is about 416.6043764661.

The spelling of 72305525 in words is "seventy-two million, three hundred five thousand, five hundred twenty-five".