65053821 has 48 divisors (see below), whose sum is σ = 107163648. Its totient is φ = 34927200.

The previous prime is 65053817. The next prime is 65053831. The reversal of 65053821 is 12835056.

It is not a de Polignac number, because 65053821 - 2² = 65053817 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65053801) 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, 239916 + ... + 240186.

It is an arithmetic number, because the mean of its divisors is an integer number (2232576).

Almost surely, 2^65053821 is an apocalyptic number.

It is an amenable number.

65053821 is a deficient number, since it is larger than the sum of its proper divisors (42109827).

65053821 is a wasteful number, since it uses less digits than its factorization.

65053821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 65053821 is about 8065.5948943646. The cubic root of 65053821 is about 402.1835193364.

Adding to 65053821 its reverse (12835056), we get a palindrome (77888877).

The spelling of 65053821 in words is "sixty-five million, fifty-three thousand, eight hundred twenty-one".