133321442 has 16 divisors (see below), whose sum is σ = 211464960. Its totient is φ = 62865072.

The previous prime is 133321403. The next prime is 133321453. The reversal of 133321442 is 244123331.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 608 + ... + 16340.

It is an arithmetic number, because the mean of its divisors is an integer number (13216560).

Almost surely, 2^133321442 is an apocalyptic number.

133321442 is a deficient number, since it is larger than the sum of its proper divisors (78143518).

133321442 is a wasteful number, since it uses less digits than its factorization.

133321442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15977.

The product of its digits is 1728, while the sum is 23.

The square root of 133321442 is about 11546.4904624739. The cubic root of 133321442 is about 510.8577670760.

Adding to 133321442 its reverse (244123331), we get a palindrome (377444773).

The spelling of 133321442 in words is "one hundred thirty-three million, three hundred twenty-one thousand, four hundred forty-two".