3216431 has 2 divisors, whose sum is σ = 3216432. Its totient is φ = 3216430.

The previous prime is 3216413. The next prime is 3216449. The reversal of 3216431 is 1346123.

Together with previous prime (3216413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (3216413) and next prime (3216449).

It is an emirp because it is prime and its reverse (1346123) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3216431 is a prime.

It is a super-2 number, since 2×3216431² = 20690856755522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3216131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1608215 + 1608216.

It is an arithmetic number, because the mean of its divisors is an integer number (1608216).

Almost surely, 2^3216431 is an apocalyptic number.

3216431 is a deficient number, since it is larger than the sum of its proper divisors (1).

3216431 is an equidigital number, since it uses as much as digits as its factorization.

3216431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 20.

The square root of 3216431 is about 1793.4411058075. The cubic root of 3216431 is about 147.6130474924.

The spelling of 3216431 in words is "three million, two hundred sixteen thousand, four hundred thirty-one".