65248821 has 40 divisors (see below), whose sum is σ = 108017184. Its totient is φ = 38918880.

The previous prime is 65248801. The next prime is 65248823. The reversal of 65248821 is 12884256.

It is not a de Polignac number, because 65248821 - 2¹⁹ = 64724533 is a prime.

It is a super-3 number, since 3×65248821³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65248823) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 59151 + ... + 60243.

Almost surely, 2^65248821 is an apocalyptic number.

It is an amenable number.

65248821 is a deficient number, since it is larger than the sum of its proper divisors (42768363).

65248821 is a wasteful number, since it uses less digits than its factorization.

65248821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183 (or 1174 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 65248821 is about 8077.6742321042. The cubic root of 65248821 is about 402.5849692661.

The spelling of 65248821 in words is "sixty-five million, two hundred forty-eight thousand, eight hundred twenty-one".