231540103 has 4 divisors (see below), whose sum is σ = 241607088. Its totient is φ = 221473120.

The previous prime is 231540091. The next prime is 231540107. The reversal of 231540103 is 301045132.

231540103 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231540103 is a prime.

It is a super-2 number, since 2×231540103² = 107221638594501218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231540107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5033458 + ... + 5033503.

It is an arithmetic number, because the mean of its divisors is an integer number (60401772).

Almost surely, 2^231540103 is an apocalyptic number.

231540103 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

231540103 is a deficient number, since it is larger than the sum of its proper divisors (10066985).

231540103 is a wasteful number, since it uses less digits than its factorization.

231540103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10066984.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 231540103 is about 15216.4418639838. The cubic root of 231540103 is about 614.0570766437.

Adding to 231540103 its reverse (301045132), we get a palindrome (532585235).

The spelling of 231540103 in words is "two hundred thirty-one million, five hundred forty thousand, one hundred three".