221034140 has 24 divisors (see below), whose sum is σ = 484354080. Its totient is φ = 84569408.

The previous prime is 221034137. The next prime is 221034211. The reversal of 221034140 is 41430122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239795 + ... + 240714.

It is an arithmetic number, because the mean of its divisors is an integer number (20181420).

Almost surely, 2^221034140 is an apocalyptic number.

221034140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221034140 is an abundant number, since it is smaller than the sum of its proper divisors (263319940).

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

221034140 is a wasteful number, since it uses less digits than its factorization.

221034140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480541 (or 480539 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 221034140 is about 14867.2169554359. The cubic root of 221034140 is about 604.6254905042.

Adding to 221034140 its reverse (41430122), we get a palindrome (262464262).

The spelling of 221034140 in words is "two hundred twenty-one million, thirty-four thousand, one hundred forty".