52194721 has 2 divisors, whose sum is σ = 52194722. Its totient is φ = 52194720.

The previous prime is 52194713. The next prime is 52194739. The reversal of 52194721 is 12749125.

52194721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32490000 + 19704721 = 5700^2 + 4439^2 .

It is a cyclic number.

It is not a de Polignac number, because 52194721 - 2³ = 52194713 is a prime.

It is not a weakly prime, because it can be changed into another prime (52194221) 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 as a sum of consecutive naturals, namely, 26097360 + 26097361.

It is an arithmetic number, because the mean of its divisors is an integer number (26097361).

Almost surely, 2^52194721 is an apocalyptic number.

It is an amenable number.

52194721 is a deficient number, since it is larger than the sum of its proper divisors (1).

52194721 is an equidigital number, since it uses as much as digits as its factorization.

52194721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 31.

The square root of 52194721 is about 7224.5914071316. The cubic root of 52194721 is about 373.7164317007.

The spelling of 52194721 in words is "fifty-two million, one hundred ninety-four thousand, seven hundred twenty-one".