231520000004405 has 16 divisors (see below), whose sum is σ = 319017944498304. Its totient is φ = 158004170614080.

The previous prime is 231520000004401. The next prime is 231520000004453. The reversal of 231520000004405 is 504400000025132.

It is a happy number.

It is not a de Polignac number, because 231520000004405 - 2² = 231520000004401 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231520000004401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15675009542 + ... + 15675024311.

It is an arithmetic number, because the mean of its divisors is an integer number (19938621531144).

Almost surely, 2^{231520000004405} is an apocalyptic number.

It is an amenable number.

231520000004405 is a deficient number, since it is larger than the sum of its proper divisors (87497944493899).

231520000004405 is a wasteful number, since it uses less digits than its factorization.

231520000004405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31350034076.

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 231520000004405 its reverse (504400000025132), we get a palindrome (735920000029537).

The spelling of 231520000004405 in words is "two hundred thirty-one trillion, five hundred twenty billion, four thousand, four hundred five".