53338987217 has 2 divisors, whose sum is σ = 53338987218. Its totient is φ = 53338987216.

The previous prime is 53338987181. The next prime is 53338987231. The reversal of 53338987217 is 71278983335.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47502638401 + 5836348816 = 217951^2 + 76396^2 .

It is a cyclic number.

It is not a de Polignac number, because 53338987217 - 2⁶ = 53338987153 is a prime.

It is not a weakly prime, because it can be changed into another prime (53338987297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26669493608 + 26669493609.

It is an arithmetic number, because the mean of its divisors is an integer number (26669493609).

Almost surely, 2^53338987217 is an apocalyptic number.

It is an amenable number.

53338987217 is a deficient number, since it is larger than the sum of its proper divisors (1).

53338987217 is an equidigital number, since it uses as much as digits as its factorization.

53338987217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7620480, while the sum is 56.

The spelling of 53338987217 in words is "fifty-three billion, three hundred thirty-eight million, nine hundred eighty-seven thousand, two hundred seventeen".