221013344 has 48 divisors (see below), whose sum is σ = 446614560. Its totient is φ = 107627520.

The previous prime is 221013343. The next prime is 221013347. The reversal of 221013344 is 443310122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221013341) 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, 201662 + ... + 202754.

It is an arithmetic number, because the mean of its divisors is an integer number (9304470).

Almost surely, 2^221013344 is an apocalyptic number.

It is an amenable number.

221013344 is an abundant number, since it is smaller than the sum of its proper divisors (225601216).

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

221013344 is a wasteful number, since it uses less digits than its factorization.

221013344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263 (or 1255 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 221013344 is about 14866.5175478321. The cubic root of 221013344 is about 604.6065278437.

Adding to 221013344 its reverse (443310122), we get a palindrome (664323466).

The spelling of 221013344 in words is "two hundred twenty-one million, thirteen thousand, three hundred forty-four".