15805229231 has 16 divisors (see below), whose sum is σ = 17674536960. Its totient is φ = 14010278880.

The previous prime is 15805229221. The next prime is 15805229243. The reversal of 15805229231 is 13292250851.

15805229231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-15805229231 is a prime.

It is a super-2 number, since 2×15805229231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15805229221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82250 + ... + 195896.

It is an arithmetic number, because the mean of its divisors is an integer number (1104658560).

Almost surely, 2^15805229231 is an apocalyptic number.

15805229231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

15805229231 is a deficient number, since it is larger than the sum of its proper divisors (1869307729).

15805229231 is a wasteful number, since it uses less digits than its factorization.

15805229231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113974.

The product of its (nonzero) digits is 43200, while the sum is 38.

The spelling of 15805229231 in words is "fifteen billion, eight hundred five million, two hundred twenty-nine thousand, two hundred thirty-one".