88538221 has 2 divisors, whose sum is σ = 88538222. Its totient is φ = 88538220.

The previous prime is 88538209. The next prime is 88538231. The reversal of 88538221 is 12283588.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87796900 + 741321 = 9370^2 + 861^2 .

It is a cyclic number.

It is not a de Polignac number, because 88538221 - 2¹⁷ = 88407149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88538231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44269110 + 44269111.

It is an arithmetic number, because the mean of its divisors is an integer number (44269111).

Almost surely, 2^88538221 is an apocalyptic number.

It is an amenable number.

88538221 is a deficient number, since it is larger than the sum of its proper divisors (1).

88538221 is an equidigital number, since it uses as much as digits as its factorization.

88538221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30720, while the sum is 37.

The square root of 88538221 is about 9409.4750650607. The cubic root of 88538221 is about 445.7009883550.

The spelling of 88538221 in words is "eighty-eight million, five hundred thirty-eight thousand, two hundred twenty-one".