43055631540 has 192 divisors, whose sum is σ = 144284958720. Its totient is φ = 10627943040.

The previous prime is 43055631497. The next prime is 43055631547. The reversal of 43055631540 is 4513655034.

43055631540 is a `hidden beast` number, since 4 + 3 + 0 + 55 + 63 + 1 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 43055631495 and 43055631504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43055631547) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 329107 + ... + 440933.

It is an arithmetic number, because the mean of its divisors is an integer number (751484160).

Almost surely, 2^43055631540 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 43055631540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72142479360).

43055631540 is an abundant number, since it is smaller than the sum of its proper divisors (101229327180).

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

43055631540 is a wasteful number, since it uses less digits than its factorization.

43055631540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111899 (or 111891 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The spelling of 43055631540 in words is "forty-three billion, fifty-five million, six hundred thirty-one thousand, five hundred forty".