133431141 has 4 divisors (see below), whose sum is σ = 177908192. Its totient is φ = 88954092.

The previous prime is 133431131. The next prime is 133431143. The reversal of 133431141 is 141134331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 133431141 - 2¹⁹ = 132906853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133431143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22238521 + ... + 22238526.

It is an arithmetic number, because the mean of its divisors is an integer number (44477048).

Almost surely, 2^133431141 is an apocalyptic number.

It is an amenable number.

133431141 is a deficient number, since it is larger than the sum of its proper divisors (44477051).

133431141 is an equidigital number, since it uses as much as digits as its factorization.

133431141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44477050.

The product of its digits is 432, while the sum is 21.

The square root of 133431141 is about 11551.2398035882. The cubic root of 133431141 is about 510.9978426258.

Adding to 133431141 its reverse (141134331), we get a palindrome (274565472).

The spelling of 133431141 in words is "one hundred thirty-three million, four hundred thirty-one thousand, one hundred forty-one".