231042031 has 4 divisors (see below), whose sum is σ = 252045864. Its totient is φ = 210038200.

The previous prime is 231042029. The next prime is 231042041. The reversal of 231042031 is 130240132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231042031 - 2¹ = 231042029 is a prime.

It is a super-2 number, since 2×231042031² = 106760840177209922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231041996 and 231042014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231042041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10501900 + ... + 10501921.

It is an arithmetic number, because the mean of its divisors is an integer number (63011466).

Almost surely, 2^231042031 is an apocalyptic number.

231042031 is a deficient number, since it is larger than the sum of its proper divisors (21003833).

231042031 is a wasteful number, since it uses less digits than its factorization.

231042031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21003832.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 231042031 is about 15200.0668090637. The cubic root of 231042031 is about 613.6164557775.

Adding to 231042031 its reverse (130240132), we get a palindrome (361282163).

The spelling of 231042031 in words is "two hundred thirty-one million, forty-two thousand, thirty-one".