2129431 has 2 divisors, whose sum is σ = 2129432. Its totient is φ = 2129430.

The previous prime is 2129423. The next prime is 2129443. The reversal of 2129431 is 1349212.

2129431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2129431 - 2³ = 2129423 is a prime.

It is a super-2 number, since 2×2129431² = 9068952767522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2129401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064715 + 1064716.

It is an arithmetic number, because the mean of its divisors is an integer number (1064716).

2^2129431 is an apocalyptic number.

2129431 is a deficient number, since it is larger than the sum of its proper divisors (1).

2129431 is an equidigital number, since it uses as much as digits as its factorization.

2129431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 22.

The square root of 2129431 is about 1459.2570027243. The cubic root of 2129431 is about 128.6533770925.

The spelling of 2129431 in words is "two million, one hundred twenty-nine thousand, four hundred thirty-one".