763322221 has 2 divisors, whose sum is σ = 763322222. Its totient is φ = 763322220.

The previous prime is 763322129. The next prime is 763322249. The reversal of 763322221 is 122223367.

It is an a-pointer prime, because the next prime (763322249) can be obtained adding 763322221 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 743162121 + 20160100 = 27261^2 + 4490^2 .

It is a cyclic number.

It is not a de Polignac number, because 763322221 - 2¹⁵ = 763289453 is a prime.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 763322221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (763322281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 381661110 + 381661111.

It is an arithmetic number, because the mean of its divisors is an integer number (381661111).

Almost surely, 2^763322221 is an apocalyptic number.

It is an amenable number.

763322221 is a deficient number, since it is larger than the sum of its proper divisors (1).

763322221 is an equidigital number, since it uses as much as digits as its factorization.

763322221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 28.

The square root of 763322221 is about 27628.2866099221. The cubic root of 763322221 is about 913.9083284885.

Adding to 763322221 its reverse (122223367), we get a palindrome (885545588).

The spelling of 763322221 in words is "seven hundred sixty-three million, three hundred twenty-two thousand, two hundred twenty-one".