40231231220432 has 160 divisors (see below), whose sum is σ = 96856699822080. Its totient is φ = 15797808069120.

The previous prime is 40231231220429. The next prime is 40231231220441. The reversal of 40231231220432 is 23402213213204.

It is a junction number, because it is equal to n+sod(n) for n = 40231231220395 and 40231231220404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107142518 + ... + 107517354.

It is an arithmetic number, because the mean of its divisors is an integer number (605354373888).

Almost surely, 2^{40231231220432} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40231231220432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48428349911040).

40231231220432 is an abundant number, since it is smaller than the sum of its proper divisors (56625468601648).

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

40231231220432 is a wasteful number, since it uses less digits than its factorization.

40231231220432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376529 (or 376523 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 40231231220432 its reverse (23402213213204), we get a palindrome (63633444433636).

The spelling of 40231231220432 in words is "forty trillion, two hundred thirty-one billion, two hundred thirty-one million, two hundred twenty thousand, four hundred thirty-two".