230431603521 has 32 divisors (see below), whose sum is σ = 354045024000. Its totient is φ = 130586296320.

The previous prime is 230431603511. The next prime is 230431603529. The reversal of 230431603521 is 125306134032.

It is not a de Polignac number, because 230431603521 - 2¹⁰ = 230431602497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (230431603529) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1948245 + ... + 2063133.

It is an arithmetic number, because the mean of its divisors is an integer number (11063907000).

Almost surely, 2^230431603521 is an apocalyptic number.

230431603521 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

230431603521 is a deficient number, since it is larger than the sum of its proper divisors (123613420479).

230431603521 is a wasteful number, since it uses less digits than its factorization.

230431603521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115689.

The product of its (nonzero) digits is 12960, while the sum is 30.

Adding to 230431603521 its reverse (125306134032), we get a palindrome (355737737553).

The spelling of 230431603521 in words is "two hundred thirty billion, four hundred thirty-one million, six hundred three thousand, five hundred twenty-one".