4497311807221 has 2 divisors, whose sum is σ = 4497311807222. Its totient is φ = 4497311807220.

The previous prime is 4497311807213. The next prime is 4497311807243. The reversal of 4497311807221 is 1227081137944.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3393015576196 + 1104296231025 = 1842014^2 + 1050855^2 .

It is a cyclic number.

It is not a de Polignac number, because 4497311807221 - 2³ = 4497311807213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4497311807201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2248655903610 + 2248655903611.

It is an arithmetic number, because the mean of its divisors is an integer number (2248655903611).

Almost surely, 2^{4497311807221} is an apocalyptic number.

It is an amenable number.

4497311807221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4497311807221 is an equidigital number, since it uses as much as digits as its factorization.

4497311807221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 677376, while the sum is 49.

The spelling of 4497311807221 in words is "four trillion, four hundred ninety-seven billion, three hundred eleven million, eight hundred seven thousand, two hundred twenty-one".