43021215020 has 72 divisors (see below), whose sum is σ = 106817694480. Its totient is φ = 14508305280.

The previous prime is 43021215001. The next prime is 43021215023. The reversal of 43021215020 is 2051212034.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 43021214983 and 43021215001.

It is not an unprimeable number, because it can be changed into a prime (43021215023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 300050 + ... + 419609.

It is an arithmetic number, because the mean of its divisors is an integer number (1483579090).

Almost surely, 2^43021215020 is an apocalyptic number.

It is an amenable number.

43021215020 is an abundant number, since it is smaller than the sum of its proper divisors (63796479460).

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

43021215020 is a wasteful number, since it uses less digits than its factorization.

43021215020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719743 (or 719734 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 43021215020 its reverse (2051212034), we get a palindrome (45072427054).

The spelling of 43021215020 in words is "forty-three billion, twenty-one million, two hundred fifteen thousand, twenty".