131431233 has 8 divisors (see below), whose sum is σ = 185550048. Its totient is φ = 82466624.

The previous prime is 131431231. The next prime is 131431241. The reversal of 131431233 is 332134131.

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

It is a cyclic number.

It is not a de Polignac number, because 131431233 - 2¹ = 131431231 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131431231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1288491 + ... + 1288592.

It is an arithmetic number, because the mean of its divisors is an integer number (23193756).

Almost surely, 2^131431233 is an apocalyptic number.

It is an amenable number.

131431233 is a deficient number, since it is larger than the sum of its proper divisors (54118815).

131431233 is a wasteful number, since it uses less digits than its factorization.

131431233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2577103.

The product of its digits is 648, while the sum is 21.

The square root of 131431233 is about 11464.3461653947. The cubic root of 131431233 is about 508.4319813805.

Adding to 131431233 its reverse (332134131), we get a palindrome (463565364).

The spelling of 131431233 in words is "one hundred thirty-one million, four hundred thirty-one thousand, two hundred thirty-three".