2131756339 has 2 divisors, whose sum is σ = 2131756340. Its totient is φ = 2131756338.

The previous prime is 2131756309. The next prime is 2131756411. The reversal of 2131756339 is 9336571312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2131756339 - 2¹¹ = 2131754291 is a prime.

It is not a weakly prime, because it can be changed into another prime (2131756309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065878169 + 1065878170.

It is an arithmetic number, because the mean of its divisors is an integer number (1065878170).

Almost surely, 2^2131756339 is an apocalyptic number.

2131756339 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131756339 is an equidigital number, since it uses as much as digits as its factorization.

2131756339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102060, while the sum is 40.

The square root of 2131756339 is about 46170.9469146995. The cubic root of 2131756339 is about 1287.0018989299.

The spelling of 2131756339 in words is "two billion, one hundred thirty-one million, seven hundred fifty-six thousand, three hundred thirty-nine".