65481273 has 48 divisors (see below), whose sum is σ = 112641984. Its totient is φ = 36132480.

The previous prime is 65481211. The next prime is 65481281. The reversal of 65481273 is 37218456.

It is not a de Polignac number, because 65481273 - 2¹⁸ = 65219129 is a prime.

It is a super-2 number, since 2×65481273² = 8575594227401058, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65481173) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 106515 + ... + 107127.

It is an arithmetic number, because the mean of its divisors is an integer number (2346708).

Almost surely, 2^65481273 is an apocalyptic number.

It is an amenable number.

65481273 is a deficient number, since it is larger than the sum of its proper divisors (47160711).

65481273 is a wasteful number, since it uses less digits than its factorization.

65481273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726 (or 723 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 65481273 is about 8092.0499874877. The cubic root of 65481273 is about 403.0624786400.

The spelling of 65481273 in words is "sixty-five million, four hundred eighty-one thousand, two hundred seventy-three".