88205721 has 8 divisors (see below), whose sum is σ = 117709440. Its totient is φ = 58752912.

The previous prime is 88205717. The next prime is 88205731. The reversal of 88205721 is 12750288.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 88205721 - 2² = 88205717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (88205731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8481 + ... + 15758.

It is an arithmetic number, because the mean of its divisors is an integer number (14713680).

Almost surely, 2^88205721 is an apocalyptic number.

It is an amenable number.

88205721 is a deficient number, since it is larger than the sum of its proper divisors (29503719).

88205721 is a wasteful number, since it uses less digits than its factorization.

88205721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25455.

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 88205721 is about 9391.7900849625. The cubic root of 88205721 is about 445.1423539853.

It can be divided in two parts, 8820 and 5721, that added together give a palindrome (14541).

The spelling of 88205721 in words is "eighty-eight million, two hundred five thousand, seven hundred twenty-one".