7221144487 has 2 divisors, whose sum is σ = 7221144488. Its totient is φ = 7221144486.

The previous prime is 7221144473. The next prime is 7221144521. The reversal of 7221144487 is 7844411227.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7221144487 - 2¹⁵ = 7221111719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7221144457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3610572243 + 3610572244.

It is an arithmetic number, because the mean of its divisors is an integer number (3610572244).

Almost surely, 2^7221144487 is an apocalyptic number.

7221144487 is a deficient number, since it is larger than the sum of its proper divisors (1).

7221144487 is an equidigital number, since it uses as much as digits as its factorization.

7221144487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100352, while the sum is 40.

The square root of 7221144487 is about 84977.3174853149. The cubic root of 7221144487 is about 1932.8671790282.

The spelling of 7221144487 in words is "seven billion, two hundred twenty-one million, one hundred forty-four thousand, four hundred eighty-seven".