52781805 has 12 divisors (see below), whose sum is σ = 91488540. Its totient is φ = 28150272.

The previous prime is 52781797. The next prime is 52781819. The reversal of 52781805 is 50818725.

It can be written as a sum of positive squares in 2 ways, for example, as 15069924 + 37711881 = 3882^2 + 6141^2 .

It is not a de Polignac number, because 52781805 - 2³ = 52781797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 52781805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 586420 + ... + 586509.

It is an arithmetic number, because the mean of its divisors is an integer number (7624045).

Almost surely, 2^52781805 is an apocalyptic number.

It is an amenable number.

52781805 is a deficient number, since it is larger than the sum of its proper divisors (38706735).

52781805 is a wasteful number, since it uses less digits than its factorization.

52781805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172940 (or 1172937 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 52781805 is about 7265.1087397230. The cubic root of 52781805 is about 375.1123929775.

The spelling of 52781805 in words is "fifty-two million, seven hundred eighty-one thousand, eight hundred five".