221140324 has 24 divisors (see below), whose sum is σ = 392001120. Its totient is φ = 109147776.

The previous prime is 221140321. The next prime is 221140343. The reversal of 221140324 is 423041122.

221140324 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (221140321) 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, 147772 + ... + 149260.

It is an arithmetic number, because the mean of its divisors is an integer number (16333380).

Almost surely, 2^221140324 is an apocalyptic number.

It is an amenable number.

221140324 is a deficient number, since it is larger than the sum of its proper divisors (170860796).

221140324 is a wasteful number, since it uses less digits than its factorization.

221140324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1947 (or 1945 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 221140324 is about 14870.7876052346. The cubic root of 221140324 is about 604.7222949693.

Adding to 221140324 its reverse (423041122), we get a palindrome (644181446).

The spelling of 221140324 in words is "two hundred twenty-one million, one hundred forty thousand, three hundred twenty-four".