231850137 has 4 divisors (see below), whose sum is σ = 309133520. Its totient is φ = 154566756.

The previous prime is 231850133. The next prime is 231850139. The reversal of 231850137 is 731058132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 231850137 - 2² = 231850133 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231850133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38641687 + ... + 38641692.

It is an arithmetic number, because the mean of its divisors is an integer number (77283380).

Almost surely, 2^231850137 is an apocalyptic number.

It is an amenable number.

231850137 is a deficient number, since it is larger than the sum of its proper divisors (77283383).

231850137 is an equidigital number, since it uses as much as digits as its factorization.

231850137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77283382.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 231850137 is about 15226.6259230336. The cubic root of 231850137 is about 614.3310301397.

The spelling of 231850137 in words is "two hundred thirty-one million, eight hundred fifty thousand, one hundred thirty-seven".