88622221 has 2 divisors, whose sum is σ = 88622222. Its totient is φ = 88622220.

The previous prime is 88622167. The next prime is 88622227. The reversal of 88622221 is 12222688.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85766121 + 2856100 = 9261^2 + 1690^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-88622221 is a prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88622227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44311110 + 44311111.

It is an arithmetic number, because the mean of its divisors is an integer number (44311111).

Almost surely, 2^88622221 is an apocalyptic number.

It is an amenable number.

88622221 is a deficient number, since it is larger than the sum of its proper divisors (1).

88622221 is an equidigital number, since it uses as much as digits as its factorization.

88622221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6144, while the sum is 31.

The square root of 88622221 is about 9413.9375927398. The cubic root of 88622221 is about 445.8418956712.

The spelling of 88622221 in words is "eighty-eight million, six hundred twenty-two thousand, two hundred twenty-one".