43131213135 has 48 divisors (see below), whose sum is σ = 75066264000. Its totient is φ = 22909516800.

The previous prime is 43131213133. The next prime is 43131213137. The reversal of 43131213135 is 53131213134.

43131213135 is a `hidden beast` number, since 4 + 31 + 312 + 1 + 313 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (43131213133) and next prime (43131213137).

It is not a de Polignac number, because 43131213135 - 2¹ = 43131213133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43131213099 and 43131213108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43131213133) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14380366 + ... + 14383364.

It is an arithmetic number, because the mean of its divisors is an integer number (1563880500).

Almost surely, 2^43131213135 is an apocalyptic number.

43131213135 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

43131213135 is a deficient number, since it is larger than the sum of its proper divisors (31935050865).

43131213135 is a wasteful number, since it uses less digits than its factorization.

43131213135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4208 (or 4205 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

Adding to 43131213135 its reverse (53131213134), we get a palindrome (96262426269).

Subtracting 43131213135 from its reverse (53131213134), we obtain a palindrome (9999999999).

The spelling of 43131213135 in words is "forty-three billion, one hundred thirty-one million, two hundred thirteen thousand, one hundred thirty-five".