221131342 has 16 divisors (see below), whose sum is σ = 353372112. Its totient is φ = 103420800.

The previous prime is 221131321. The next prime is 221131343. The reversal of 221131342 is 243131122.

It is a happy number.

221131342 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221131343) 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, 14409 + ... + 25492.

It is an arithmetic number, because the mean of its divisors is an integer number (22085757).

Almost surely, 2^221131342 is an apocalyptic number.

221131342 is a deficient number, since it is larger than the sum of its proper divisors (132240770).

221131342 is a wasteful number, since it uses less digits than its factorization.

221131342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40083.

The product of its digits is 288, while the sum is 19.

The square root of 221131342 is about 14870.4856006790. The cubic root of 221131342 is about 604.7141075749.

Adding to 221131342 its reverse (243131122), we get a palindrome (464262464).

The spelling of 221131342 in words is "two hundred twenty-one million, one hundred thirty-one thousand, three hundred forty-two".