221040354 has 16 divisors (see below), whose sum is σ = 456341760. Its totient is φ = 71303280.

The previous prime is 221040353. The next prime is 221040359. The reversal of 221040354 is 453040122.

It is a self number, because there is not a number n which added to its sum of digits gives 221040354.

It is not an unprimeable number, because it can be changed into a prime (221040353) 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, 594009 + ... + 594380.

It is an arithmetic number, because the mean of its divisors is an integer number (28521360).

Almost surely, 2^221040354 is an apocalyptic number.

221040354 is an abundant number, since it is smaller than the sum of its proper divisors (235301406).

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

221040354 is a wasteful number, since it uses less digits than its factorization.

221040354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188425.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 221040354 is about 14867.4259372630. The cubic root of 221040354 is about 604.6311564579.

Adding to 221040354 its reverse (453040122), we get a palindrome (674080476).

The spelling of 221040354 in words is "two hundred twenty-one million, forty thousand, three hundred fifty-four".