43215020531 has 16 divisors (see below), whose sum is σ = 45005720256. Its totient is φ = 41462400000.

The previous prime is 43215020521. The next prime is 43215020533. The reversal of 43215020531 is 13502051234.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 43215020531 - 2⁶ = 43215020467 is a prime.

It is a super-2 number, since 2×43215020531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43215020531.

It is not an unprimeable number, because it can be changed into a prime (43215020533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1148801 + ... + 1185821.

It is an arithmetic number, because the mean of its divisors is an integer number (2812857516).

Almost surely, 2^43215020531 is an apocalyptic number.

43215020531 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

43215020531 is a deficient number, since it is larger than the sum of its proper divisors (1790699725).

43215020531 is a wasteful number, since it uses less digits than its factorization.

43215020531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37534.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 43215020531 its reverse (13502051234), we get a palindrome (56717071765).

The spelling of 43215020531 in words is "forty-three billion, two hundred fifteen million, twenty thousand, five hundred thirty-one".