2131214909 has 2 divisors, whose sum is σ = 2131214910. Its totient is φ = 2131214908.

The previous prime is 2131214893. The next prime is 2131214923. The reversal of 2131214909 is 9094121312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2065248025 + 65966884 = 45445^2 + 8122^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131214909 - 2⁴ = 2131214893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131214929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065607454 + 1065607455.

It is an arithmetic number, because the mean of its divisors is an integer number (1065607455).

Almost surely, 2^2131214909 is an apocalyptic number.

It is an amenable number.

2131214909 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131214909 is an equidigital number, since it uses as much as digits as its factorization.

2131214909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 2131214909 is about 46165.0832231460. The cubic root of 2131214909 is about 1286.8929308102.

The spelling of 2131214909 in words is "two billion, one hundred thirty-one million, two hundred fourteen thousand, nine hundred nine".