52805921 has 8 divisors (see below), whose sum is σ = 63526080. Its totient is φ = 42879888.

The previous prime is 52805911. The next prime is 52805923. The reversal of 52805921 is 12950825.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52805921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (52805923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198386 + ... + 198651.

It is an arithmetic number, because the mean of its divisors is an integer number (7940760).

Almost surely, 2^52805921 is an apocalyptic number.

It is an amenable number.

52805921 is a deficient number, since it is larger than the sum of its proper divisors (10720159).

52805921 is a wasteful number, since it uses less digits than its factorization.

52805921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397063.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 52805921 is about 7266.7682638158. The cubic root of 52805921 is about 375.1695138804.

The spelling of 52805921 in words is "fifty-two million, eight hundred five thousand, nine hundred twenty-one".