53537730217 has 2 divisors, whose sum is σ = 53537730218. Its totient is φ = 53537730216.

The previous prime is 53537730203. The next prime is 53537730227. The reversal of 53537730217 is 71203773535.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30074843241 + 23462886976 = 173421^2 + 153176^2 .

It is a cyclic number.

It is not a de Polignac number, because 53537730217 - 2²³ = 53529341609 is a prime.

It is not a weakly prime, because it can be changed into another prime (53537730227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26768865108 + 26768865109.

It is an arithmetic number, because the mean of its divisors is an integer number (26768865109).

Almost surely, 2^53537730217 is an apocalyptic number.

It is an amenable number.

53537730217 is a deficient number, since it is larger than the sum of its proper divisors (1).

53537730217 is an equidigital number, since it uses as much as digits as its factorization.

53537730217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 463050, while the sum is 43.

The spelling of 53537730217 in words is "fifty-three billion, five hundred thirty-seven million, seven hundred thirty thousand, two hundred seventeen".