65054821 has 4 divisors (see below), whose sum is σ = 70059052. Its totient is φ = 60050592.

The previous prime is 65054813. The next prime is 65054831. The reversal of 65054821 is 12845056.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18610596 + 46444225 = 4314^2 + 6815^2 .

It is a cyclic number.

It is not a de Polignac number, because 65054821 - 2³ = 65054813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65054831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2502096 + ... + 2502121.

It is an arithmetic number, because the mean of its divisors is an integer number (17514763).

Almost surely, 2^65054821 is an apocalyptic number.

It is an amenable number.

65054821 is a deficient number, since it is larger than the sum of its proper divisors (5004231).

65054821 is a wasteful number, since it uses less digits than its factorization.

65054821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5004230.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 65054821 is about 8065.6568858339. The cubic root of 65054821 is about 402.1855800991.

Adding to 65054821 its reverse (12845056), we get a palindrome (77899877).

The spelling of 65054821 in words is "sixty-five million, fifty-four thousand, eight hundred twenty-one".