245531137 has 2 divisors, whose sum is σ = 245531138. Its totient is φ = 245531136.

The previous prime is 245531113. The next prime is 245531159. The reversal of 245531137 is 731135542.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 239135296 + 6395841 = 15464^2 + 2529^2 .

It is a cyclic number.

It is not a de Polignac number, because 245531137 - 2⁷ = 245531009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 245531099 and 245531108.

It is not a weakly prime, because it can be changed into another prime (245531177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122765568 + 122765569.

It is an arithmetic number, because the mean of its divisors is an integer number (122765569).

Almost surely, 2^245531137 is an apocalyptic number.

It is an amenable number.

245531137 is a deficient number, since it is larger than the sum of its proper divisors (1).

245531137 is an equidigital number, since it uses as much as digits as its factorization.

245531137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 31.

The square root of 245531137 is about 15669.4332060863. The cubic root of 245531137 is about 626.1843246228.

Adding to 245531137 its reverse (731135542), we get a palindrome (976666679).

The spelling of 245531137 in words is "two hundred forty-five million, five hundred thirty-one thousand, one hundred thirty-seven".