2221700549 has 2 divisors, whose sum is σ = 2221700550. Its totient is φ = 2221700548.

The previous prime is 2221700477. The next prime is 2221700561. The reversal of 2221700549 is 9450071222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1491349924 + 730350625 = 38618^2 + 27025^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221700549 - 2²⁰ = 2220651973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221700449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110850274 + 1110850275.

It is an arithmetic number, because the mean of its divisors is an integer number (1110850275).

Almost surely, 2^2221700549 is an apocalyptic number.

It is an amenable number.

2221700549 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221700549 is an equidigital number, since it uses as much as digits as its factorization.

2221700549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 2221700549 is about 47134.9185742375. The cubic root of 2221700549 is about 1304.8537583172.

The spelling of 2221700549 in words is "two billion, two hundred twenty-one million, seven hundred thousand, five hundred forty-nine".