131433217 has 4 divisors (see below), whose sum is σ = 132436656. Its totient is φ = 130429780.

The previous prime is 131433209. The next prime is 131433221. The reversal of 131433217 is 712334131.

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 a cyclic number.

It is not a de Polignac number, because 131433217 - 2³ = 131433209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131433191 and 131433200.

It is not an unprimeable number, because it can be changed into a prime (131433277) 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, 501523 + ... + 501784.

It is an arithmetic number, because the mean of its divisors is an integer number (33109164).

Almost surely, 2^131433217 is an apocalyptic number.

It is an amenable number.

131433217 is a deficient number, since it is larger than the sum of its proper divisors (1003439).

131433217 is a wasteful number, since it uses less digits than its factorization.

131433217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003438.

The product of its digits is 1512, while the sum is 25.

The square root of 131433217 is about 11464.4326942069. The cubic root of 131433217 is about 508.4345396866.

Adding to 131433217 its reverse (712334131), we get a palindrome (843767348).

The spelling of 131433217 in words is "one hundred thirty-one million, four hundred thirty-three thousand, two hundred seventeen".