134431231 has 4 divisors (see below), whose sum is σ = 146652264. Its totient is φ = 122210200.

The previous prime is 134431217. The next prime is 134431237. The reversal of 134431231 is 132134431.

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

It is a cyclic number.

It is not a de Polignac number, because 134431231 - 2⁷ = 134431103 is a prime.

It is a super-2 number, since 2×134431231² = 36143511736350722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134431237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6110500 + ... + 6110521.

It is an arithmetic number, because the mean of its divisors is an integer number (36663066).

Almost surely, 2^134431231 is an apocalyptic number.

134431231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

134431231 is a deficient number, since it is larger than the sum of its proper divisors (12221033).

134431231 is a wasteful number, since it uses less digits than its factorization.

134431231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12221032.

The product of its digits is 864, while the sum is 22.

The square root of 134431231 is about 11594.4482835536. The cubic root of 134431231 is about 512.2713392792.

Adding to 134431231 its reverse (132134431), we get a palindrome (266565662).

The spelling of 134431231 in words is "one hundred thirty-four million, four hundred thirty-one thousand, two hundred thirty-one".