53326561 has 2 divisors, whose sum is σ = 53326562. Its totient is φ = 53326560.

The previous prime is 53326547. The next prime is 53326601. The reversal of 53326561 is 16562335.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53012961 + 313600 = 7281^2 + 560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53326561 is a prime.

It is not a weakly prime, because it can be changed into another prime (53326531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26663280 + 26663281.

It is an arithmetic number, because the mean of its divisors is an integer number (26663281).

Almost surely, 2^53326561 is an apocalyptic number.

It is an amenable number.

53326561 is a deficient number, since it is larger than the sum of its proper divisors (1).

53326561 is an equidigital number, since it uses as much as digits as its factorization.

53326561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200, while the sum is 31.

The square root of 53326561 is about 7302.5037487152. The cubic root of 53326561 is about 376.3984783538.

Adding to 53326561 its reverse (16562335), we get a palindrome (69888896).

The spelling of 53326561 in words is "fifty-three million, three hundred twenty-six thousand, five hundred sixty-one".