221140415 has 8 divisors (see below), whose sum is σ = 265459200. Its totient is φ = 176851872.

The previous prime is 221140393. The next prime is 221140417. The reversal of 221140415 is 514041122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221140415 - 2⁸ = 221140159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221140417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14261 + ... + 25409.

It is an arithmetic number, because the mean of its divisors is an integer number (33182400).

Almost surely, 2^221140415 is an apocalyptic number.

221140415 is a deficient number, since it is larger than the sum of its proper divisors (44318785).

221140415 is a wasteful number, since it uses less digits than its factorization.

221140415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15121.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 221140415 is about 14870.7906649243. The cubic root of 221140415 is about 604.7223779178.

Adding to 221140415 its reverse (514041122), we get a palindrome (735181537).

The spelling of 221140415 in words is "two hundred twenty-one million, one hundred forty thousand, four hundred fifteen".