221355355 has 12 divisors (see below), whose sum is σ = 287632080. Its totient is φ = 163461792.

The previous prime is 221355319. The next prime is 221355373. The reversal of 221355355 is 553553122.

It is not a de Polignac number, because 221355355 - 2⁷ = 221355227 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130135 + ... + 131824.

It is an arithmetic number, because the mean of its divisors is an integer number (23969340).

Almost surely, 2^221355355 is an apocalyptic number.

221355355 is a deficient number, since it is larger than the sum of its proper divisors (66276725).

221355355 is a wasteful number, since it uses less digits than its factorization.

221355355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261990 (or 261977 counting only the distinct ones).

The product of its digits is 22500, while the sum is 31.

The square root of 221355355 is about 14878.0158287320. The cubic root of 221355355 is about 604.9182367934.

The spelling of 221355355 in words is "two hundred twenty-one million, three hundred fifty-five thousand, three hundred fifty-five".