133142431 has 2 divisors, whose sum is σ = 133142432. Its totient is φ = 133142430.

The previous prime is 133142417. The next prime is 133142441. The reversal of 133142431 is 134241331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133142431 - 2²³ = 124753823 is a prime.

It is a super-2 number, since 2×133142431² = 35453813865179522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133142411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66571215 + 66571216.

It is an arithmetic number, because the mean of its divisors is an integer number (66571216).

Almost surely, 2^133142431 is an apocalyptic number.

133142431 is a deficient number, since it is larger than the sum of its proper divisors (1).

133142431 is an equidigital number, since it uses as much as digits as its factorization.

133142431 is an odious number, because the sum of its binary digits is odd.

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

The square root of 133142431 is about 11538.7361092972. The cubic root of 133142431 is about 510.6290213754.

Adding to 133142431 its reverse (134241331), we get a palindrome (267383762).

The spelling of 133142431 in words is "one hundred thirty-three million, one hundred forty-two thousand, four hundred thirty-one".