65224172 has 24 divisors (see below), whose sum is σ = 130154976. Its totient is φ = 28332288.

The previous prime is 65224171. The next prime is 65224213. The reversal of 65224172 is 27142256.

It is a happy number.

It is a super-2 number, since 2×65224172² = 8508385226171168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65224171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36008 + ... + 37775.

It is an arithmetic number, because the mean of its divisors is an integer number (5423124).

Almost surely, 2^65224172 is an apocalyptic number.

It is an amenable number.

65224172 is a deficient number, since it is larger than the sum of its proper divisors (64930804).

65224172 is a wasteful number, since it uses less digits than its factorization.

65224172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73817 (or 73815 counting only the distinct ones).

The product of its digits is 6720, while the sum is 29.

The square root of 65224172 is about 8076.1483394004. The cubic root of 65224172 is about 402.5342681367.

The spelling of 65224172 in words is "sixty-five million, two hundred twenty-four thousand, one hundred seventy-two".