43155231221760 has 2304 divisors, whose sum is σ = 178007880960000. Its totient is φ = 8708562616320.

The previous prime is 43155231221699. The next prime is 43155231221771. The reversal of 43155231221760 is 6712213255134.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 113866045251 + ... + 113866045629.

It is an arithmetic number, because the mean of its divisors is an integer number (77260365000).

Almost surely, 2^{43155231221760} is an apocalyptic number.

43155231221760 is a gapful number since it is divisible by the number (40) 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 43155231221760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89003940480000).

43155231221760 is an abundant number, since it is smaller than the sum of its proper divisors (134852649738240).

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

43155231221760 is a wasteful number, since it uses less digits than its factorization.

43155231221760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526 (or 475 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 42.

Adding to 43155231221760 its reverse (6712213255134), we get a palindrome (49867444476894).

The spelling of 43155231221760 in words is "forty-three trillion, one hundred fifty-five billion, two hundred thirty-one million, two hundred twenty-one thousand, seven hundred sixty".