231642137 has 8 divisors (see below), whose sum is σ = 239381760. Its totient is φ = 223919280.

The previous prime is 231642101. The next prime is 231642139. The reversal of 231642137 is 731246132.

It is a happy number.

231642137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231642137 - 2¹² = 231638041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231642139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27923 + ... + 35255.

It is an arithmetic number, because the mean of its divisors is an integer number (29922720).

Almost surely, 2^231642137 is an apocalyptic number.

It is an amenable number.

231642137 is a deficient number, since it is larger than the sum of its proper divisors (7739623).

231642137 is a wasteful number, since it uses less digits than its factorization.

231642137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8383.

The product of its digits is 6048, while the sum is 29.

The square root of 231642137 is about 15219.7942495948. The cubic root of 231642137 is about 614.1472633222.

Adding to 231642137 its reverse (731246132), we get a palindrome (962888269).

The spelling of 231642137 in words is "two hundred thirty-one million, six hundred forty-two thousand, one hundred thirty-seven".