231321465555 has 16 divisors (see below), whose sum is σ = 370262273280. Its totient is φ = 123322138848.

The previous prime is 231321465521. The next prime is 231321465593. The reversal of 231321465555 is 555564123132.

It is not a de Polignac number, because 231321465555 - 2⁶ = 231321465491 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3043045 + ... + 3118134.

It is an arithmetic number, because the mean of its divisors is an integer number (23141392080).

Almost surely, 2^231321465555 is an apocalyptic number.

231321465555 is a deficient number, since it is larger than the sum of its proper divisors (138940807725).

231321465555 is a wasteful number, since it uses less digits than its factorization.

231321465555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6163690.

The product of its digits is 540000, while the sum is 42.

Adding to 231321465555 its reverse (555564123132), we get a palindrome (786885588687).

The spelling of 231321465555 in words is "two hundred thirty-one billion, three hundred twenty-one million, four hundred sixty-five thousand, five hundred fifty-five".