133143438 has 16 divisors (see below), whose sum is σ = 266708736. Its totient is φ = 44310840.

The previous prime is 133143421. The next prime is 133143443. The reversal of 133143438 is 834341331.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13398 + ... + 21113.

It is an arithmetic number, because the mean of its divisors is an integer number (16669296).

Almost surely, 2^133143438 is an apocalyptic number.

133143438 is an abundant number, since it is smaller than the sum of its proper divisors (133565298).

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

133143438 is a wasteful number, since it uses less digits than its factorization.

133143438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35159.

The product of its digits is 10368, while the sum is 30.

The square root of 133143438 is about 11538.7797448430. The cubic root of 133143438 is about 510.6303087239.

Adding to 133143438 its reverse (834341331), we get a palindrome (967484769).

The spelling of 133143438 in words is "one hundred thirty-three million, one hundred forty-three thousand, four hundred thirty-eight".