88478221 has 4 divisors (see below), whose sum is σ = 95284252. Its totient is φ = 81672192.

The previous prime is 88478207. The next prime is 88478239. The reversal of 88478221 is 12287488.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9517225 + 78960996 = 3085^2 + 8886^2 .

It is a cyclic number.

It is not a de Polignac number, because 88478221 - 2²¹ = 86381069 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 (88472221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3402996 + ... + 3403021.

It is an arithmetic number, because the mean of its divisors is an integer number (23821063).

Almost surely, 2^88478221 is an apocalyptic number.

It is an amenable number.

88478221 is a deficient number, since it is larger than the sum of its proper divisors (6806031).

88478221 is a wasteful number, since it uses less digits than its factorization.

88478221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6806030.

The product of its digits is 57344, while the sum is 40.

The square root of 88478221 is about 9406.2862490996. The cubic root of 88478221 is about 445.6002856978.

The spelling of 88478221 in words is "eighty-eight million, four hundred seventy-eight thousand, two hundred twenty-one".