221301040 has 20 divisors (see below), whose sum is σ = 514525104. Its totient is φ = 88520384.

The previous prime is 221301007. The next prime is 221301061. The reversal of 221301040 is 40103122.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 221301040.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1383052 + ... + 1383211.

Almost surely, 2^221301040 is an apocalyptic number.

221301040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221301040 is an abundant number, since it is smaller than the sum of its proper divisors (293224064).

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

221301040 is a wasteful number, since it uses less digits than its factorization.

221301040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2766276 (or 2766270 counting only the distinct ones).

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

The square root of 221301040 is about 14876.1903725383. The cubic root of 221301040 is about 604.8687555392.

Adding to 221301040 its reverse (40103122), we get a palindrome (261404162).

The spelling of 221301040 in words is "two hundred twenty-one million, three hundred one thousand, forty".