265221172 has 12 divisors (see below), whose sum is σ = 464254560. Its totient is φ = 132577016.

The previous prime is 265221167. The next prime is 265221181. The reversal of 265221172 is 271122562.

It is a self number, because there is not a number n which added to its sum of digits gives 265221172.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 20223 + ... + 30649.

It is an arithmetic number, because the mean of its divisors is an integer number (38687880).

Almost surely, 2^265221172 is an apocalyptic number.

It is an amenable number.

265221172 is a deficient number, since it is larger than the sum of its proper divisors (199033388).

265221172 is a wasteful number, since it uses less digits than its factorization.

265221172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16790 (or 16788 counting only the distinct ones).

The product of its digits is 3360, while the sum is 28.

The square root of 265221172 is about 16285.6124232403. The cubic root of 265221172 is about 642.4944738532.

The spelling of 265221172 in words is "two hundred sixty-five million, two hundred twenty-one thousand, one hundred seventy-two".