53835821 has 32 divisors (see below), whose sum is σ = 64447488. Its totient is φ = 44513280.

The previous prime is 53835811. The next prime is 53835823. The reversal of 53835821 is 12853835.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53835821 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 (53835823) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 737441 + ... + 737513.

It is an arithmetic number, because the mean of its divisors is an integer number (2013984).

Almost surely, 2^53835821 is an apocalyptic number.

It is an amenable number.

53835821 is a deficient number, since it is larger than the sum of its proper divisors (10611667).

53835821 is a wasteful number, since it uses less digits than its factorization.

53835821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221.

The product of its digits is 28800, while the sum is 35.

The square root of 53835821 is about 7337.2897584871. The cubic root of 53835821 is about 377.5928657690.

The spelling of 53835821 in words is "fifty-three million, eight hundred thirty-five thousand, eight hundred twenty-one".