231513983280 has 240 divisors, whose sum is σ = 812887186176. Its totient is φ = 58937725440.

The previous prime is 231513983269. The next prime is 231513983333. The reversal of 231513983280 is 82389315132.

231513983280 is a `hidden beast` number, since 2 + 3 + 151 + 398 + 32 + 80 = 666.

231513983280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 481159²-1.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 8647515 + ... + 8674245.

Almost surely, 2^231513983280 is an apocalyptic number.

231513983280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231513983280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (406443593088).

231513983280 is an abundant number, since it is smaller than the sum of its proper divisors (581373202896).

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

231513983280 is a wasteful number, since it uses less digits than its factorization.

231513983280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27296 (or 27287 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 231513983280 in words is "two hundred thirty-one billion, five hundred thirteen million, nine hundred eighty-three thousand, two hundred eighty".