133345442 has 4 divisors (see below), whose sum is σ = 200018166. Its totient is φ = 66672720.

The previous prime is 133345427. The next prime is 133345453. The reversal of 133345442 is 244543331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 131354521 + 1990921 = 11461^2 + 1411^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33336359 + ... + 33336362.

Almost surely, 2^133345442 is an apocalyptic number.

133345442 is a deficient number, since it is larger than the sum of its proper divisors (66672724).

133345442 is an equidigital number, since it uses as much as digits as its factorization.

133345442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66672723.

The product of its digits is 17280, while the sum is 29.

The square root of 133345442 is about 11547.5296925360. The cubic root of 133345442 is about 510.8884194367. Note that the first 3 decimals are identical.

Adding to 133345442 its reverse (244543331), we get a palindrome (377888773).

The spelling of 133345442 in words is "one hundred thirty-three million, three hundred forty-five thousand, four hundred forty-two".