3138221137 has 2 divisors, whose sum is σ = 3138221138. Its totient is φ = 3138221136.

The previous prime is 3138221059. The next prime is 3138221153. The reversal of 3138221137 is 7311228313.

3138221137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2975811601 + 162409536 = 54551^2 + 12744^2 .

It is a cyclic number.

It is not a de Polignac number, because 3138221137 - 2¹⁵ = 3138188369 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3138221099 and 3138221108.

It is not a weakly prime, because it can be changed into another prime (3138221837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1569110568 + 1569110569.

It is an arithmetic number, because the mean of its divisors is an integer number (1569110569).

Almost surely, 2^3138221137 is an apocalyptic number.

It is an amenable number.

3138221137 is a deficient number, since it is larger than the sum of its proper divisors (1).

3138221137 is an equidigital number, since it uses as much as digits as its factorization.

3138221137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 3138221137 is about 56019.8280700682. The cubic root of 3138221137 is about 1464.0677730042.

The spelling of 3138221137 in words is "three billion, one hundred thirty-eight million, two hundred twenty-one thousand, one hundred thirty-seven".