52471621 has 4 divisors (see below), whose sum is σ = 52991244. Its totient is φ = 51952000.

The previous prime is 52471607. The next prime is 52471631. The reversal of 52471621 is 12617425.

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 43046721 + 9424900 = 6561^2 + 3070^2 .

It is a cyclic number.

It is not a de Polignac number, because 52471621 - 2⁵ = 52471589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52471621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52471631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 259660 + ... + 259861.

It is an arithmetic number, because the mean of its divisors is an integer number (13247811).

Almost surely, 2^52471621 is an apocalyptic number.

It is an amenable number.

52471621 is a deficient number, since it is larger than the sum of its proper divisors (519623).

52471621 is a wasteful number, since it uses less digits than its factorization.

52471621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519622.

The product of its digits is 3360, while the sum is 28.

The square root of 52471621 is about 7243.7297713264. The cubic root of 52471621 is about 374.3761384038.

The spelling of 52471621 in words is "fifty-two million, four hundred seventy-one thousand, six hundred twenty-one".