2721431 has 2 divisors, whose sum is σ = 2721432. Its totient is φ = 2721430.

The previous prime is 2721421. The next prime is 2721437. The reversal of 2721431 is 1341272.

2721431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2721431 - 2¹⁴ = 2705047 is a prime.

It is a super-2 number, since 2×2721431² = 14812373375522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2721437) 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, 1360715 + 1360716.

It is an arithmetic number, because the mean of its divisors is an integer number (1360716).

2^2721431 is an apocalyptic number.

2721431 is a deficient number, since it is larger than the sum of its proper divisors (1).

2721431 is an equidigital number, since it uses as much as digits as its factorization.

2721431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 20.

The square root of 2721431 is about 1649.6760288008. The cubic root of 2721431 is about 139.6151163287.

The spelling of 2721431 in words is "two million, seven hundred twenty-one thousand, four hundred thirty-one".