2131284469 has 2 divisors, whose sum is σ = 2131284470. Its totient is φ = 2131284468.

The previous prime is 2131284433. The next prime is 2131284557. The reversal of 2131284469 is 9644821312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1347844369 + 783440100 = 36713^2 + 27990^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131284469 - 2⁷ = 2131284341 is a prime.

It is a super-2 number, since 2×2131284469² = 9084746975601223922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131287469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065642234 + 1065642235.

It is an arithmetic number, because the mean of its divisors is an integer number (1065642235).

Almost surely, 2^2131284469 is an apocalyptic number.

It is an amenable number.

2131284469 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131284469 is an equidigital number, since it uses as much as digits as its factorization.

2131284469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 40.

The square root of 2131284469 is about 46165.8366002394. The cubic root of 2131284469 is about 1286.9069314784.

The spelling of 2131284469 in words is "two billion, one hundred thirty-one million, two hundred eighty-four thousand, four hundred sixty-nine".