928221055 has 4 divisors (see below), whose sum is σ = 1113865272. Its totient is φ = 742576840.

The previous prime is 928221037. The next prime is 928221059. The reversal of 928221055 is 550122829.

It is a happy number.

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

It is not a de Polignac number, because 928221055 - 2⁵ = 928221023 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 928221055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (928221059) 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, 92822101 + ... + 92822110.

It is an arithmetic number, because the mean of its divisors is an integer number (278466318).

Almost surely, 2^928221055 is an apocalyptic number.

928221055 is a deficient number, since it is larger than the sum of its proper divisors (185644217).

928221055 is a wasteful number, since it uses less digits than its factorization.

928221055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185644216.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 928221055 is about 30466.7204503537. The cubic root of 928221055 is about 975.4772347013.

The spelling of 928221055 in words is "nine hundred twenty-eight million, two hundred twenty-one thousand, fifty-five".