231616143330 has 64 divisors (see below), whose sum is σ = 653060354688. Its totient is φ = 51830184960.

The previous prime is 231616143301. The next prime is 231616143331. The reversal of 231616143330 is 33341616132.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 231616143291 and 231616143300.

It is not an unprimeable number, because it can be changed into a prime (231616143331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26990599 + ... + 26999178.

It is an arithmetic number, because the mean of its divisors is an integer number (10204068042).

Almost surely, 2^231616143330 is an apocalyptic number.

231616143330 is an abundant number, since it is smaller than the sum of its proper divisors (421444211358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231616143330 is a wasteful number, since it uses less digits than its factorization.

231616143330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53989811.

The product of its (nonzero) digits is 23328, while the sum is 33.

Adding to 231616143330 its reverse (33341616132), we get a palindrome (264957759462).

The spelling of 231616143330 in words is "two hundred thirty-one billion, six hundred sixteen million, one hundred forty-three thousand, three hundred thirty".