43140312520 has 16 divisors (see below), whose sum is σ = 97065703260. Its totient is φ = 17256124992.

The previous prime is 43140312461. The next prime is 43140312539. The reversal of 43140312520 is 2521304134.

43140312520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 42959194756 + 181117764 = 207266^2 + 13458^2 .

It is a super-2 number, since 2×43140312520² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 539253867 + ... + 539253946.

Almost surely, 2^43140312520 is an apocalyptic number.

43140312520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43140312520 is an abundant number, since it is smaller than the sum of its proper divisors (53925390740).

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

43140312520 is a wasteful number, since it uses less digits than its factorization.

43140312520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078507824 (or 1078507820 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 43140312520 its reverse (2521304134), we get a palindrome (45661616654).

The spelling of 43140312520 in words is "forty-three billion, one hundred forty million, three hundred twelve thousand, five hundred twenty".