2231243242537 has 2 divisors, whose sum is σ = 2231243242538. Its totient is φ = 2231243242536.

The previous prime is 2231243242507. The next prime is 2231243242603. The reversal of 2231243242537 is 7352423421322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2141624438041 + 89618804496 = 1463429^2 + 299364^2 .

It is a cyclic number.

It is not a de Polignac number, because 2231243242537 - 2²³ = 2231234853929 is a prime.

It is a super-3 number, since 3×2231243242537³ (a number of 38 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2231243242537.

It is not a weakly prime, because it can be changed into another prime (2231243242507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115621621268 + 1115621621269.

It is an arithmetic number, because the mean of its divisors is an integer number (1115621621269).

Almost surely, 2^{2231243242537} is an apocalyptic number.

It is an amenable number.

2231243242537 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231243242537 is an equidigital number, since it uses as much as digits as its factorization.

2231243242537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 40.

Adding to 2231243242537 its reverse (7352423421322), we get a palindrome (9583666663859).

The spelling of 2231243242537 in words is "two trillion, two hundred thirty-one billion, two hundred forty-three million, two hundred forty-two thousand, five hundred thirty-seven".