221310040 has 64 divisors (see below), whose sum is σ = 570369600. Its totient is φ = 75706368.

The previous prime is 221310031. The next prime is 221310079. The reversal of 221310040 is 40013122.

221310040 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 221310040.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226032 + ... + 227008.

It is an arithmetic number, because the mean of its divisors is an integer number (8912025).

Almost surely, 2^221310040 is an apocalyptic number.

221310040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221310040 is an abundant number, since it is smaller than the sum of its proper divisors (349059560).

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

221310040 is a wasteful number, since it uses less digits than its factorization.

221310040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804 (or 1800 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 221310040 is about 14876.4928662639. The cubic root of 221310040 is about 604.8769551467.

Adding to 221310040 its reverse (40013122), we get a palindrome (261323162).

The spelling of 221310040 in words is "two hundred twenty-one million, three hundred ten thousand, forty".