133332431 has 2 divisors, whose sum is σ = 133332432. Its totient is φ = 133332430.

The previous prime is 133332361. The next prime is 133332439. The reversal of 133332431 is 134233331.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133332431 is a prime.

It is a super-2 number, since 2×133332431² = 35555074312739522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 133332397 and 133332406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133332439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66666215 + 66666216.

It is an arithmetic number, because the mean of its divisors is an integer number (66666216).

Almost surely, 2^133332431 is an apocalyptic number.

133332431 is a deficient number, since it is larger than the sum of its proper divisors (1).

133332431 is an equidigital number, since it uses as much as digits as its factorization.

133332431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 23.

The square root of 133332431 is about 11546.9663115469. The cubic root of 133332431 is about 510.8718024822.

Adding to 133332431 its reverse (134233331), we get a palindrome (267565762).

The spelling of 133332431 in words is "one hundred thirty-three million, three hundred thirty-two thousand, four hundred thirty-one".