133431242 has 8 divisors (see below), whose sum is σ = 228739296. Its totient is φ = 57184812.

The previous prime is 133431239. The next prime is 133431271. The reversal of 133431242 is 242134331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4765388 + ... + 4765415.

It is an arithmetic number, because the mean of its divisors is an integer number (28592412).

Almost surely, 2^133431242 is an apocalyptic number.

133431242 is a deficient number, since it is larger than the sum of its proper divisors (95308054).

133431242 is an equidigital number, since it uses as much as digits as its factorization.

133431242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9530812.

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

The square root of 133431242 is about 11551.2441754124. The cubic root of 133431242 is about 510.9979715581.

Adding to 133431242 its reverse (242134331), we get a palindrome (375565573).

The spelling of 133431242 in words is "one hundred thirty-three million, four hundred thirty-one thousand, two hundred forty-two".