65172522 has 16 divisors (see below), whose sum is σ = 132482592. Its totient is φ = 21367920.

The previous prime is 65172491. The next prime is 65172539. The reversal of 65172522 is 22527156.

65172522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 65172522.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 88668 + ... + 89399.

It is an arithmetic number, because the mean of its divisors is an integer number (8280162).

Almost surely, 2^65172522 is an apocalyptic number.

65172522 is an abundant number, since it is smaller than the sum of its proper divisors (67310070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65172522 is a wasteful number, since it uses less digits than its factorization.

65172522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178133.

The product of its digits is 8400, while the sum is 30.

The square root of 65172522 is about 8072.9500184257. The cubic root of 65172522 is about 402.4279865506.

Adding to 65172522 its reverse (22527156), we get a palindrome (87699678).

The spelling of 65172522 in words is "sixty-five million, one hundred seventy-two thousand, five hundred twenty-two".