221333142 has 16 divisors (see below), whose sum is σ = 445141440. Its totient is φ = 73365192.

The previous prime is 221333089. The next prime is 221333143. The reversal of 221333142 is 241333122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221333143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101968 + ... + 104115.

It is an arithmetic number, because the mean of its divisors is an integer number (27821340).

Almost surely, 2^221333142 is an apocalyptic number.

221333142 is an abundant number, since it is smaller than the sum of its proper divisors (223808298).

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

221333142 is a wasteful number, since it uses less digits than its factorization.

221333142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206267.

The product of its digits is 864, while the sum is 21.

The square root of 221333142 is about 14877.2693058908. The cubic root of 221333142 is about 604.8980016105.

Adding to 221333142 its reverse (241333122), we get a palindrome (462666264).

The spelling of 221333142 in words is "two hundred twenty-one million, three hundred thirty-three thousand, one hundred forty-two".