133431342 has 32 divisors (see below), whose sum is σ = 291893760. Its totient is φ = 40326720.

The previous prime is 133431307. The next prime is 133431367. The reversal of 133431342 is 243134331.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24523 + ... + 29465.

It is an arithmetic number, because the mean of its divisors is an integer number (9121680).

Almost surely, 2^133431342 is an apocalyptic number.

133431342 is an abundant number, since it is smaller than the sum of its proper divisors (158462418).

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

133431342 is a wasteful number, since it uses less digits than its factorization.

133431342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5368.

The product of its digits is 2592, while the sum is 24.

The square root of 133431342 is about 11551.2485039497. The cubic root of 133431342 is about 510.9980992139.

Adding to 133431342 its reverse (243134331), we get a palindrome (376565673).

The spelling of 133431342 in words is "one hundred thirty-three million, four hundred thirty-one thousand, three hundred forty-two".