221412140 has 12 divisors (see below), whose sum is σ = 464965536. Its totient is φ = 88564848.

The previous prime is 221412133. The next prime is 221412161. The reversal of 221412140 is 41214122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5535284 + ... + 5535323.

It is an arithmetic number, because the mean of its divisors is an integer number (38747128).

Almost surely, 2^221412140 is an apocalyptic number.

221412140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221412140 is an abundant number, since it is smaller than the sum of its proper divisors (243553396).

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

221412140 is a wasteful number, since it uses less digits than its factorization.

221412140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11070616 (or 11070614 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 221412140 is about 14879.9240589460. The cubic root of 221412140 is about 604.9699595766.

Adding to 221412140 its reverse (41214122), we get a palindrome (262626262).

The spelling of 221412140 in words is "two hundred twenty-one million, four hundred twelve thousand, one hundred forty".