231200210320 has 40 divisors (see below), whose sum is σ = 550651240440. Its totient is φ = 90224471040.

The previous prime is 231200210309. The next prime is 231200210333. The reversal of 231200210320 is 23012002132.

It can be written as a sum of positive squares in 4 ways, for example, as 911556864 + 230288653456 = 30192^2 + 479884^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 231200210294 and 231200210303.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35240655 + ... + 35247214.

It is an arithmetic number, because the mean of its divisors is an integer number (13766281011).

Almost surely, 2^231200210320 is an apocalyptic number.

231200210320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231200210320 is an abundant number, since it is smaller than the sum of its proper divisors (319451030120).

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

231200210320 is a wasteful number, since it uses less digits than its factorization.

231200210320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70487923 (or 70487917 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 231200210320 its reverse (23012002132), we get a palindrome (254212212452).

The spelling of 231200210320 in words is "two hundred thirty-one billion, two hundred million, two hundred ten thousand, three hundred twenty".