65272281 has 8 divisors (see below), whose sum is σ = 87614400. Its totient is φ = 43222512.

The previous prime is 65272253. The next prime is 65272289. The reversal of 65272281 is 18227256.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65272281 - 2¹⁵ = 65239513 is a prime.

It is a super-2 number, since 2×65272281² = 8520941333885922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65272289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72565 + ... + 73458.

It is an arithmetic number, because the mean of its divisors is an integer number (10951800).

Almost surely, 2^65272281 is an apocalyptic number.

It is an amenable number.

65272281 is a deficient number, since it is larger than the sum of its proper divisors (22342119).

65272281 is a wasteful number, since it uses less digits than its factorization.

65272281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146175.

The product of its digits is 13440, while the sum is 33.

The square root of 65272281 is about 8079.1262522627. The cubic root of 65272281 is about 402.6332128539.

The spelling of 65272281 in words is "sixty-five million, two hundred seventy-two thousand, two hundred eighty-one".