221401140 has 48 divisors (see below), whose sum is σ = 631628928. Its totient is φ = 57925504.

The previous prime is 221401133. The next prime is 221401171. The reversal of 221401140 is 41104122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 31632 + ... + 37991.

It is an arithmetic number, because the mean of its divisors is an integer number (13158936).

Almost surely, 2^221401140 is an apocalyptic number.

221401140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221401140 is an abundant number, since it is smaller than the sum of its proper divisors (410227788).

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

221401140 is a wasteful number, since it uses less digits than its factorization.

221401140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69688 (or 69686 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 221401140 is about 14879.5544288127. The cubic root of 221401140 is about 604.9599408852.

Adding to 221401140 its reverse (41104122), we get a palindrome (262505262).

The spelling of 221401140 in words is "two hundred twenty-one million, four hundred one thousand, one hundred forty".