53915453993221 has 2 divisors, whose sum is σ = 53915453993222. Its totient is φ = 53915453993220.

The previous prime is 53915453993197. The next prime is 53915453993243. The reversal of 53915453993221 is 12239935451935.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28217195264196 + 25698258729025 = 5311986^2 + 5069345^2 .

It is a cyclic number.

It is not a de Polignac number, because 53915453993221 - 2⁹ = 53915453992709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53915453993221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53915453990221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26957726996610 + 26957726996611.

It is an arithmetic number, because the mean of its divisors is an integer number (26957726996611).

Almost surely, 2^{53915453993221} is an apocalyptic number.

It is an amenable number.

53915453993221 is a deficient number, since it is larger than the sum of its proper divisors (1).

53915453993221 is an equidigital number, since it uses as much as digits as its factorization.

53915453993221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39366000, while the sum is 61.

The spelling of 53915453993221 in words is "fifty-three trillion, nine hundred fifteen billion, four hundred fifty-three million, nine hundred ninety-three thousand, two hundred twenty-one".