2231207137 has 2 divisors, whose sum is σ = 2231207138. Its totient is φ = 2231207136.

The previous prime is 2231207089. The next prime is 2231207201. The reversal of 2231207137 is 7317021322.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1331447121 + 899760016 = 36489^2 + 29996^2 .

It is a cyclic number.

It is not a de Polignac number, because 2231207137 - 2²³ = 2222818529 is a prime.

It is a super-3 number, since 3×2231207137³ (a number of 29 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (2231207837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115603568 + 1115603569.

It is an arithmetic number, because the mean of its divisors is an integer number (1115603569).

Almost surely, 2^2231207137 is an apocalyptic number.

It is an amenable number.

2231207137 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231207137 is an equidigital number, since it uses as much as digits as its factorization.

2231207137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 2231207137 is about 47235.6553569441. The cubic root of 2231207137 is about 1306.7122529896.

Adding to 2231207137 its reverse (7317021322), we get a palindrome (9548228459).

The spelling of 2231207137 in words is "two billion, two hundred thirty-one million, two hundred seven thousand, one hundred thirty-seven".