2139131 has 2 divisors, whose sum is σ = 2139132. Its totient is φ = 2139130.

The previous prime is 2139107. The next prime is 2139143. The reversal of 2139131 is 1319312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2139131 is a prime.

It is a super-2 number, since 2×2139131² = 9151762870322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2139931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069565 + 1069566.

It is an arithmetic number, because the mean of its divisors is an integer number (1069566).

2^2139131 is an apocalyptic number.

2139131 is a deficient number, since it is larger than the sum of its proper divisors (1).

2139131 is an equidigital number, since it uses as much as digits as its factorization.

2139131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162, while the sum is 20.

The square root of 2139131 is about 1462.5768355885. The cubic root of 2139131 is about 128.8484288327.

The spelling of 2139131 in words is "two million, one hundred thirty-nine thousand, one hundred thirty-one".