231301137 has 16 divisors (see below), whose sum is σ = 319066112. Its totient is φ = 148890960.

The previous prime is 231301127. The next prime is 231301139. The reversal of 231301137 is 731103132.

It is not a de Polignac number, because 231301137 - 2¹² = 231297041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231301139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42738 + ... + 47844.

It is an arithmetic number, because the mean of its divisors is an integer number (19941632).

Almost surely, 2^231301137 is an apocalyptic number.

It is an amenable number.

231301137 is a deficient number, since it is larger than the sum of its proper divisors (87764975).

231301137 is a wasteful number, since it uses less digits than its factorization.

231301137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5628.

The product of its (nonzero) digits is 378, while the sum is 21.

The square root of 231301137 is about 15208.5876070068. The cubic root of 231301137 is about 613.8457536056.

Adding to 231301137 its reverse (731103132), we get a palindrome (962404269).

The spelling of 231301137 in words is "two hundred thirty-one million, three hundred one thousand, one hundred thirty-seven".