88304221 has 2 divisors, whose sum is σ = 88304222. Its totient is φ = 88304220.

The previous prime is 88304219. The next prime is 88304233. The reversal of 88304221 is 12240388.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87422500 + 881721 = 9350^2 + 939^2 .

It is a cyclic number.

It is not a de Polignac number, because 88304221 - 2¹ = 88304219 is a prime.

Together with 88304219, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 88304221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88304621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44152110 + 44152111.

It is an arithmetic number, because the mean of its divisors is an integer number (44152111).

Almost surely, 2^88304221 is an apocalyptic number.

It is an amenable number.

88304221 is a deficient number, since it is larger than the sum of its proper divisors (1).

88304221 is an equidigital number, since it uses as much as digits as its factorization.

88304221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 88304221 is about 9397.0325635277. The cubic root of 88304221 is about 445.3079902964.

The spelling of 88304221 in words is "eighty-eight million, three hundred four thousand, two hundred twenty-one".