4138561213 has 2 divisors, whose sum is σ = 4138561214. Its totient is φ = 4138561212.

The previous prime is 4138561211. The next prime is 4138561303. The reversal of 4138561213 is 3121658314.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4078993689 + 59567524 = 63867^2 + 7718^2 .

It is a cyclic number.

It is not a de Polignac number, because 4138561213 - 2¹ = 4138561211 is a prime.

Together with 4138561211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4138561211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2069280606 + 2069280607.

It is an arithmetic number, because the mean of its divisors is an integer number (2069280607).

Almost surely, 2^4138561213 is an apocalyptic number.

It is an amenable number.

4138561213 is a deficient number, since it is larger than the sum of its proper divisors (1).

4138561213 is an equidigital number, since it uses as much as digits as its factorization.

4138561213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 34.

The square root of 4138561213 is about 64331.6501653735. The cubic root of 4138561213 is about 1605.5227397671.

The spelling of 4138561213 in words is "four billion, one hundred thirty-eight million, five hundred sixty-one thousand, two hundred thirteen".