231504105 has 32 divisors (see below), whose sum is σ = 425263104. Its totient is φ = 105345216.

The previous prime is 231504073. The next prime is 231504121. The reversal of 231504105 is 501405132.

It is not a de Polignac number, because 231504105 - 2⁵ = 231504073 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18472 + ... + 28358.

It is an arithmetic number, because the mean of its divisors is an integer number (13289472).

Almost surely, 2^231504105 is an apocalyptic number.

It is an amenable number.

231504105 is a deficient number, since it is larger than the sum of its proper divisors (193758999).

231504105 is a wasteful number, since it uses less digits than its factorization.

231504105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10125.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 231504105 is about 15215.2589527750. The cubic root of 231504105 is about 614.0252521029.

Adding to 231504105 its reverse (501405132), we get a palindrome (732909237).

The spelling of 231504105 in words is "two hundred thirty-one million, five hundred four thousand, one hundred five".