43256381000 has 512 divisors, whose sum is σ = 127856102400. Its totient is φ = 13363200000.

The previous prime is 43256380997. The next prime is 43256381039. The reversal of 43256381000 is 18365234.

It is a super-2 number, since 2×43256381000² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 428280950 + ... + 428281050.

It is an arithmetic number, because the mean of its divisors is an integer number (249718950).

Almost surely, 2^43256381000 is an apocalyptic number.

43256381000 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 43256381000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63928051200).

43256381000 is an abundant number, since it is smaller than the sum of its proper divisors (84599721400).

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

43256381000 is a wasteful number, since it uses less digits than its factorization.

43256381000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The spelling of 43256381000 in words is "forty-three billion, two hundred fifty-six million, three hundred eighty-one thousand".