3213131 has 2 divisors, whose sum is σ = 3213132. Its totient is φ = 3213130.

The previous prime is 3213127. The next prime is 3213137. The reversal of 3213131 is 1313123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3213131 - 2² = 3213127 is a prime.

It is a super-2 number, since 2×3213131² = 20648421646322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3213137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1606565 + 1606566.

It is an arithmetic number, because the mean of its divisors is an integer number (1606566).

Almost surely, 2^3213131 is an apocalyptic number.

3213131 is a deficient number, since it is larger than the sum of its proper divisors (1).

3213131 is an equidigital number, since it uses as much as digits as its factorization.

3213131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54, while the sum is 14.

The square root of 3213131 is about 1792.5208506458. The cubic root of 3213131 is about 147.5625474460.

Adding to 3213131 its reverse (1313123), we get a palindrome (4526254).

It can be divided in two parts, 3213 and 131, that multiplied together give a triangular number (420903 = T₉₁₇).

The spelling of 3213131 in words is "three million, two hundred thirteen thousand, one hundred thirty-one".