231551423322555 has 64 divisors (see below), whose sum is σ = 424571048755200. Its totient is φ = 105561794851200.

The previous prime is 231551423322553. The next prime is 231551423322577. The reversal of 231551423322555 is 555223324155132.

It is not a de Polignac number, because 231551423322555 - 2¹ = 231551423322553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231551423322553) by changing a digit.

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, 53715630 + ... + 57865980.

It is an arithmetic number, because the mean of its divisors is an integer number (6633922636800).

Almost surely, 2^{231551423322555} is an apocalyptic number.

231551423322555 is a deficient number, since it is larger than the sum of its proper divisors (193019625432645).

231551423322555 is a wasteful number, since it uses less digits than its factorization.

231551423322555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4151824.

The product of its digits is 5400000, while the sum is 48.

Adding to 231551423322555 its reverse (555223324155132), we get a palindrome (786774747477687).

The spelling of 231551423322555 in words is "two hundred thirty-one trillion, five hundred fifty-one billion, four hundred twenty-three million, three hundred twenty-two thousand, five hundred fifty-five".