52281639 has 8 divisors (see below), whose sum is σ = 77454320. Its totient is φ = 34854408.

The previous prime is 52281589. The next prime is 52281643. The reversal of 52281639 is 93618225.

52281639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 52281639 - 2⁹ = 52281127 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 (52281659) 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, 968152 + ... + 968205.

It is an arithmetic number, because the mean of its divisors is an integer number (9681790).

Almost surely, 2^52281639 is an apocalyptic number.

52281639 is a deficient number, since it is larger than the sum of its proper divisors (25172681).

52281639 is a wasteful number, since it uses less digits than its factorization.

52281639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1936366 (or 1936360 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 52281639 is about 7230.6043315894. The cubic root of 52281639 is about 373.9237621873.

The spelling of 52281639 in words is "fifty-two million, two hundred eighty-one thousand, six hundred thirty-nine".