719228221 has 2 divisors, whose sum is σ = 719228222. Its totient is φ = 719228220.

The previous prime is 719228177. The next prime is 719228243. The reversal of 719228221 is 122822917.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 716632900 + 2595321 = 26770^2 + 1611^2 .

It is a cyclic number.

It is not a de Polignac number, because 719228221 - 2¹⁷ = 719097149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (719228291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359614110 + 359614111.

It is an arithmetic number, because the mean of its divisors is an integer number (359614111).

Almost surely, 2^719228221 is an apocalyptic number.

It is an amenable number.

719228221 is a deficient number, since it is larger than the sum of its proper divisors (1).

719228221 is an equidigital number, since it uses as much as digits as its factorization.

719228221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 34.

The square root of 719228221 is about 26818.4306214961. The cubic root of 719228221 is about 895.9605890702.

The spelling of 719228221 in words is "seven hundred nineteen million, two hundred twenty-eight thousand, two hundred twenty-one".