52342781 has 4 divisors (see below), whose sum is σ = 52823100. Its totient is φ = 51862464.

The previous prime is 52342729. The next prime is 52342811. The reversal of 52342781 is 18724325.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17355556 + 34987225 = 4166^2 + 5915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52342781 is a prime.

It is a super-2 number, since 2×52342781² = 5479533445627922, 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 (52342681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239996 + ... + 240213.

It is an arithmetic number, because the mean of its divisors is an integer number (13205775).

Almost surely, 2^52342781 is an apocalyptic number.

It is an amenable number.

52342781 is a deficient number, since it is larger than the sum of its proper divisors (480319).

52342781 is a wasteful number, since it uses less digits than its factorization.

52342781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480318.

The product of its digits is 13440, while the sum is 32.

The square root of 52342781 is about 7234.8310968536. The cubic root of 52342781 is about 374.0694700658.

The spelling of 52342781 in words is "fifty-two million, three hundred forty-two thousand, seven hundred eighty-one".