53621549 has 2 divisors, whose sum is σ = 53621550. Its totient is φ = 53621548.

The previous prime is 53621539. The next prime is 53621611. The reversal of 53621549 is 94512635.

53621549 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., 49984900 + 3636649 = 7070^2 + 1907^2 .

It is a cyclic number.

It is not a de Polignac number, because 53621549 - 2²⁴ = 36844333 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53621509) 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, 26810774 + 26810775.

It is an arithmetic number, because the mean of its divisors is an integer number (26810775).

Almost surely, 2^53621549 is an apocalyptic number.

It is an amenable number.

53621549 is a deficient number, since it is larger than the sum of its proper divisors (1).

53621549 is an equidigital number, since it uses as much as digits as its factorization.

53621549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 35.

The square root of 53621549 is about 7322.6736237525. The cubic root of 53621549 is about 377.0912471124.

The spelling of 53621549 in words is "fifty-three million, six hundred twenty-one thousand, five hundred forty-nine".