3138430185217 has 2 divisors, whose sum is σ = 3138430185218. Its totient is φ = 3138430185216.

The previous prime is 3138430185203. The next prime is 3138430185223. The reversal of 3138430185217 is 7125810348313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2124711454321 + 1013718730896 = 1457639^2 + 1006836^2 .

It is a cyclic number.

It is not a de Polignac number, because 3138430185217 - 2²⁷ = 3138295967489 is a prime.

It is not a weakly prime, because it can be changed into another prime (3138431185217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1569215092608 + 1569215092609.

It is an arithmetic number, because the mean of its divisors is an integer number (1569215092609).

Almost surely, 2^{3138430185217} is an apocalyptic number.

It is an amenable number.

3138430185217 is a deficient number, since it is larger than the sum of its proper divisors (1).

3138430185217 is an equidigital number, since it uses as much as digits as its factorization.

3138430185217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 3138430185217 in words is "three trillion, one hundred thirty-eight billion, four hundred thirty million, one hundred eighty-five thousand, two hundred seventeen".