53213717 has 2 divisors, whose sum is σ = 53213718. Its totient is φ = 53213716.

The previous prime is 53213687. The next prime is 53213731. The reversal of 53213717 is 71731235.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29311396 + 23902321 = 5414^2 + 4889^2 .

It is a cyclic number.

It is not a de Polignac number, because 53213717 - 2⁶ = 53213653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53213717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53213617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26606858 + 26606859.

It is an arithmetic number, because the mean of its divisors is an integer number (26606859).

Almost surely, 2^53213717 is an apocalyptic number.

It is an amenable number.

53213717 is a deficient number, since it is larger than the sum of its proper divisors (1).

53213717 is an equidigital number, since it uses as much as digits as its factorization.

53213717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4410, while the sum is 29.

The square root of 53213717 is about 7294.7732658390. The cubic root of 53213717 is about 376.1327927103.

The spelling of 53213717 in words is "fifty-three million, two hundred thirteen thousand, seven hundred seventeen".