73240225 has 12 divisors (see below), whose sum is σ = 93950460. Its totient is φ = 56571200.

The previous prime is 73240217. The next prime is 73240229. The reversal of 73240225 is 52204237.

It can be written as a sum of positive squares in 6 ways, for example, as 15358561 + 57881664 = 3919^2 + 7608^2 .

It is not a de Polignac number, because 73240225 - 2³ = 73240217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 73240225.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73240229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49786 + ... + 51235.

It is an arithmetic number, because the mean of its divisors is an integer number (7829205).

Almost surely, 2^73240225 is an apocalyptic number.

It is an amenable number.

73240225 is a deficient number, since it is larger than the sum of its proper divisors (20710235).

73240225 is a wasteful number, since it uses less digits than its factorization.

73240225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101060 (or 101055 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 73240225 is about 8558.0503036615. The cubic root of 73240225 is about 418.3918568445.

The spelling of 73240225 in words is "seventy-three million, two hundred forty thousand, two hundred twenty-five".