3215646139 has 2 divisors, whose sum is σ = 3215646140. Its totient is φ = 3215646138.

The previous prime is 3215646107. The next prime is 3215646197. The reversal of 3215646139 is 9316465123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3215646139 - 2⁵ = 3215646107 is a prime.

It is not a weakly prime, because it can be changed into another prime (3215646199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1607823069 + 1607823070.

It is an arithmetic number, because the mean of its divisors is an integer number (1607823070).

Almost surely, 2^3215646139 is an apocalyptic number.

3215646139 is a deficient number, since it is larger than the sum of its proper divisors (1).

3215646139 is an equidigital number, since it uses as much as digits as its factorization.

3215646139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 40.

The square root of 3215646139 is about 56706.6675003919. The cubic root of 3215646139 is about 1476.0103986153.

The spelling of 3215646139 in words is "three billion, two hundred fifteen million, six hundred forty-six thousand, one hundred thirty-nine".