53820005 has 8 divisors (see below), whose sum is σ = 64635000. Its totient is φ = 43022016.

The previous prime is 53820001. The next prime is 53820007. The reversal of 53820005 is 50002835.

It can be written as a sum of positive squares in 4 ways, for example, as 10233601 + 43586404 = 3199^2 + 6602^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 53820005 - 2² = 53820001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53820001) 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, 4271 + ... + 11219.

It is an arithmetic number, because the mean of its divisors is an integer number (8079375).

Almost surely, 2^53820005 is an apocalyptic number.

It is an amenable number.

53820005 is a deficient number, since it is larger than the sum of its proper divisors (10814995).

53820005 is a wasteful number, since it uses less digits than its factorization.

53820005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8503.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 53820005 is about 7336.2118971578. The cubic root of 53820005 is about 377.5558854736. Note that the first 3 decimals are identical.

The spelling of 53820005 in words is "fifty-three million, eight hundred twenty thousand, five".