3216131 has 2 divisors, whose sum is σ = 3216132. Its totient is φ = 3216130.

The previous prime is 3216127. The next prime is 3216137. The reversal of 3216131 is 1316123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3216131 - 2² = 3216127 is a prime.

It is a super-2 number, since 2×3216131² = 20686997218322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is equal to p₂₃₁₃₁₇ and since 3216131 and 231317 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (3216137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1608065 + 1608066.

It is an arithmetic number, because the mean of its divisors is an integer number (1608066).

Almost surely, 2^3216131 is an apocalyptic number.

3216131 is a deficient number, since it is larger than the sum of its proper divisors (1).

3216131 is an equidigital number, since it uses as much as digits as its factorization.

3216131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108, while the sum is 17.

The square root of 3216131 is about 1793.3574657608. The cubic root of 3216131 is about 147.6084580069.

The spelling of 3216131 in words is "three million, two hundred sixteen thousand, one hundred thirty-one".