72825224 has 8 divisors (see below), whose sum is σ = 136547310. Its totient is φ = 36412608.

The previous prime is 72825217. The next prime is 72825241. The reversal of 72825224 is 42252827.

It can be written as a sum of positive squares in only one way, i.e., 53553124 + 19272100 = 7318^2 + 4390^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4551569 + ... + 4551584.

Almost surely, 2^72825224 is an apocalyptic number.

It is an amenable number.

72825224 is a deficient number, since it is larger than the sum of its proper divisors (63722086).

72825224 is a wasteful number, since it uses less digits than its factorization.

72825224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9103159 (or 9103155 counting only the distinct ones).

The product of its digits is 17920, while the sum is 32.

The square root of 72825224 is about 8533.7696242634. The cubic root of 72825224 is about 417.6001151138.

It can be divided in two parts, 728 and 25224, that added together give a palindrome (25952).

The spelling of 72825224 in words is "seventy-two million, eight hundred twenty-five thousand, two hundred twenty-four".