231384400555 has 64 divisors (see below), whose sum is σ = 364580536320. Its totient is φ = 136578441600.

The previous prime is 231384400543. The next prime is 231384400603. The reversal of 231384400555 is 555004483132.

It is not a de Polignac number, because 231384400555 - 2¹³ = 231384392363 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16722490 + ... + 16736320.

It is an arithmetic number, because the mean of its divisors is an integer number (5696570880).

Almost surely, 2^231384400555 is an apocalyptic number.

231384400555 is a deficient number, since it is larger than the sum of its proper divisors (133196135765).

231384400555 is a wasteful number, since it uses less digits than its factorization.

231384400555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16160.

The product of its (nonzero) digits is 288000, while the sum is 40.

Adding to 231384400555 its reverse (555004483132), we get a palindrome (786388883687).

The spelling of 231384400555 in words is "two hundred thirty-one billion, three hundred eighty-four million, four hundred thousand, five hundred fifty-five".