231742731 has 8 divisors (see below), whose sum is σ = 337080384. Its totient is φ = 140450120.

The previous prime is 231742703. The next prime is 231742751. The reversal of 231742731 is 137247132.

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 231742731 - 2¹⁴ = 231726347 is a prime.

It is a super-2 number, since 2×231742731² = 107409386742676722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231742751) 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 7 ways as a sum of consecutive naturals, for example, 3511221 + ... + 3511286.

It is an arithmetic number, because the mean of its divisors is an integer number (42135048).

Almost surely, 2^231742731 is an apocalyptic number.

231742731 is a deficient number, since it is larger than the sum of its proper divisors (105337653).

231742731 is a wasteful number, since it uses less digits than its factorization.

231742731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7022521.

The product of its digits is 7056, while the sum is 30.

The square root of 231742731 is about 15223.0986004821. The cubic root of 231742731 is about 614.2361512794.

Adding to 231742731 its reverse (137247132), we get a palindrome (368989863).

The spelling of 231742731 in words is "two hundred thirty-one million, seven hundred forty-two thousand, seven hundred thirty-one".