133221342 has 16 divisors (see below), whose sum is σ = 266583312. Its totient is φ = 44383680.

The previous prime is 133221317. The next prime is 133221343. The reversal of 133221342 is 243122331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133221343) 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, 9592 + ... + 18932.

It is an arithmetic number, because the mean of its divisors is an integer number (16661457).

Almost surely, 2^133221342 is an apocalyptic number.

133221342 is an abundant number, since it is smaller than the sum of its proper divisors (133361970).

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

133221342 is a wasteful number, since it uses less digits than its factorization.

133221342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11723.

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

The square root of 133221342 is about 11542.1549980929. The cubic root of 133221342 is about 510.7298815056.

Adding to 133221342 its reverse (243122331), we get a palindrome (376343673).

The spelling of 133221342 in words is "one hundred thirty-three million, two hundred twenty-one thousand, three hundred forty-two".