52547921 has 2 divisors, whose sum is σ = 52547922. Its totient is φ = 52547920.

The previous prime is 52547903. The next prime is 52547923. The reversal of 52547921 is 12974525.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52417600 + 130321 = 7240^2 + 361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52547921 is a prime.

It is a super-2 number, since 2×52547921² = 5522568002844482, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 52547923, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (52547923) 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 as a sum of consecutive naturals, namely, 26273960 + 26273961.

It is an arithmetic number, because the mean of its divisors is an integer number (26273961).

Almost surely, 2^52547921 is an apocalyptic number.

It is an amenable number.

52547921 is a deficient number, since it is larger than the sum of its proper divisors (1).

52547921 is an equidigital number, since it uses as much as digits as its factorization.

52547921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 35.

The square root of 52547921 is about 7248.9944819954. The cubic root of 52547921 is about 374.5575130491.

The spelling of 52547921 in words is "fifty-two million, five hundred forty-seven thousand, nine hundred twenty-one".