2131242437 has 2 divisors, whose sum is σ = 2131242438. Its totient is φ = 2131242436.

The previous prime is 2131242431. The next prime is 2131242457. The reversal of 2131242437 is 7342421312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1631675236 + 499567201 = 40394^2 + 22351^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131242437 - 2⁸ = 2131242181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131242431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065621218 + 1065621219.

It is an arithmetic number, because the mean of its divisors is an integer number (1065621219).

Almost surely, 2^2131242437 is an apocalyptic number.

It is an amenable number.

2131242437 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131242437 is an equidigital number, since it uses as much as digits as its factorization.

2131242437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 29.

The square root of 2131242437 is about 46165.3813695934. The cubic root of 2131242437 is about 1286.8984715366.

Adding to 2131242437 its reverse (7342421312), we get a palindrome (9473663749).

The spelling of 2131242437 in words is "two billion, one hundred thirty-one million, two hundred forty-two thousand, four hundred thirty-seven".