131223231330 has 32 divisors (see below), whose sum is σ = 317415573504. Its totient is φ = 34717326336.

The previous prime is 131223231313. The next prime is 131223231331. The reversal of 131223231330 is 33132322131.

It is a self number, because there is not a number n which added to its sum of digits gives 131223231330.

It is not an unprimeable number, because it can be changed into a prime (131223231331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17217087 + ... + 17224706.

It is an arithmetic number, because the mean of its divisors is an integer number (9919236672).

Almost surely, 2^131223231330 is an apocalyptic number.

131223231330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131223231330 is an abundant number, since it is smaller than the sum of its proper divisors (186192342174).

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

131223231330 is a wasteful number, since it uses less digits than its factorization.

131223231330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34441930.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 131223231330 its reverse (33132322131), we get a palindrome (164355553461).

The spelling of 131223231330 in words is "one hundred thirty-one billion, two hundred twenty-three million, two hundred thirty-one thousand, three hundred thirty".