88221719 has 2 divisors, whose sum is σ = 88221720. Its totient is φ = 88221718.

The previous prime is 88221713. The next prime is 88221739. The reversal of 88221719 is 91712288.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 88221719 - 2¹⁶ = 88156183 is a prime.

It is a super-2 number, since 2×88221719² = 15566143406629922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88221713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44110859 + 44110860.

It is an arithmetic number, because the mean of its divisors is an integer number (44110860).

Almost surely, 2^88221719 is an apocalyptic number.

88221719 is a deficient number, since it is larger than the sum of its proper divisors (1).

88221719 is an equidigital number, since it uses as much as digits as its factorization.

88221719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 38.

The square root of 88221719 is about 9392.6417476661. The cubic root of 88221719 is about 445.1692643973.

The spelling of 88221719 in words is "eighty-eight million, two hundred twenty-one thousand, seven hundred nineteen".