52486781 has 8 divisors (see below), whose sum is σ = 55042680. Its totient is φ = 49980672.

The previous prime is 52486747. The next prime is 52486783. The reversal of 52486781 is 18768425.

52486781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 24661156 + 27825625 = 4966^2 + 5275^2 .

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-52486781 is a prime.

It is a super-2 number, since 2×52486781² = 5509724359483922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52486783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10280 + ... + 14513.

It is an arithmetic number, because the mean of its divisors is an integer number (6880335).

Almost surely, 2^52486781 is an apocalyptic number.

It is an amenable number.

52486781 is a deficient number, since it is larger than the sum of its proper divisors (2555899).

52486781 is a wasteful number, since it uses less digits than its factorization.

52486781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24895.

The product of its digits is 107520, while the sum is 41.

The square root of 52486781 is about 7244.7761180039. The cubic root of 52486781 is about 374.4121896105.

The spelling of 52486781 in words is "fifty-two million, four hundred eighty-six thousand, seven hundred eighty-one".