88405221 has 8 divisors (see below), whose sum is σ = 118389280. Its totient is φ = 58678992.

The previous prime is 88405217. The next prime is 88405223. The reversal of 88405221 is 12250488.

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

It is not a de Polignac number, because 88405221 - 2² = 88405217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88405223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63655 + ... + 65028.

It is an arithmetic number, because the mean of its divisors is an integer number (14798660).

Almost surely, 2^88405221 is an apocalyptic number.

It is an amenable number.

88405221 is a deficient number, since it is larger than the sum of its proper divisors (29984059).

88405221 is a wasteful number, since it uses less digits than its factorization.

88405221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128915.

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 88405221 is about 9402.4050646630. The cubic root of 88405221 is about 445.4777027213.

The spelling of 88405221 in words is "eighty-eight million, four hundred five thousand, two hundred twenty-one".