53735221 has 2 divisors, whose sum is σ = 53735222. Its totient is φ = 53735220.

The previous prime is 53735219. The next prime is 53735233. The reversal of 53735221 is 12253735.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42107121 + 11628100 = 6489^2 + 3410^2 .

It is a cyclic number.

It is not a de Polignac number, because 53735221 - 2¹ = 53735219 is a prime.

Together with 53735219, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 53735221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53735261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26867610 + 26867611.

It is an arithmetic number, because the mean of its divisors is an integer number (26867611).

Almost surely, 2^53735221 is an apocalyptic number.

It is an amenable number.

53735221 is a deficient number, since it is larger than the sum of its proper divisors (1).

53735221 is an equidigital number, since it uses as much as digits as its factorization.

53735221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6300, while the sum is 28.

The square root of 53735221 is about 7330.4311605798. The cubic root of 53735221 is about 377.3575235324.

Adding to 53735221 its reverse (12253735), we get a palindrome (65988956).

It can be divided in two parts, 53735 and 221, that added together give a triangular number (53956 = T₃₂₈).

The spelling of 53735221 in words is "fifty-three million, seven hundred thirty-five thousand, two hundred twenty-one".