52781971 has 4 divisors (see below), whose sum is σ = 57580344. Its totient is φ = 47983600.

The previous prime is 52781959. The next prime is 52781983. The reversal of 52781971 is 17918725.

52781971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (52781959) and next prime (52781983).

It is a cyclic number.

It is not a de Polignac number, because 52781971 - 2⁷ = 52781843 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52781921) 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 3 ways as a sum of consecutive naturals, for example, 2399170 + ... + 2399191.

It is an arithmetic number, because the mean of its divisors is an integer number (14395086).

Almost surely, 2^52781971 is an apocalyptic number.

52781971 is a deficient number, since it is larger than the sum of its proper divisors (4798373).

52781971 is a wasteful number, since it uses less digits than its factorization.

52781971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4798372.

The product of its digits is 35280, while the sum is 40.

The square root of 52781971 is about 7265.1201641817. The cubic root of 52781971 is about 375.1127862228.

The spelling of 52781971 in words is "fifty-two million, seven hundred eighty-one thousand, nine hundred seventy-one".