221349555 has 48 divisors (see below), whose sum is σ = 447842304. Its totient is φ = 99028800.

The previous prime is 221349523. The next prime is 221349559. The reversal of 221349555 is 555943122.

It is a happy number.

221349555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221349555 - 2⁵ = 221349523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221349559) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7330 + ... + 22280.

It is an arithmetic number, because the mean of its divisors is an integer number (9330048).

Almost surely, 2^221349555 is an apocalyptic number.

221349555 is an abundant number, since it is smaller than the sum of its proper divisors (226492749).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221349555 is a wasteful number, since it uses less digits than its factorization.

221349555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15016 (or 15013 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 221349555 is about 14877.8209089907. The cubic root of 221349555 is about 604.9129533485.

The spelling of 221349555 in words is "two hundred twenty-one million, three hundred forty-nine thousand, five hundred fifty-five".