4517721522253 has 2 divisors, whose sum is σ = 4517721522254. Its totient is φ = 4517721522252.

The previous prime is 4517721522247. The next prime is 4517721522289. The reversal of 4517721522253 is 3522251277154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2399407196004 + 2118314326249 = 1549002^2 + 1455443^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4517721522253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4517721522053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2258860761126 + 2258860761127.

It is an arithmetic number, because the mean of its divisors is an integer number (2258860761127).

Almost surely, 2^{4517721522253} is an apocalyptic number.

It is an amenable number.

4517721522253 is a deficient number, since it is larger than the sum of its proper divisors (1).

4517721522253 is an equidigital number, since it uses as much as digits as its factorization.

4517721522253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1176000, while the sum is 46.

It can be divided in two parts, 451772 and 1522253, that added together give a square (1974025 = 1405²).

The spelling of 4517721522253 in words is "four trillion, five hundred seventeen billion, seven hundred twenty-one million, five hundred twenty-two thousand, two hundred fifty-three".