43523113513 has 24 divisors (see below), whose sum is σ = 48808153800. Its totient is φ = 38767322880.

The previous prime is 43523113511. The next prime is 43523113519. The reversal of 43523113513 is 31531132534.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 27930097129 + 15593016384 = 167123^2 + 124872^2 .

It is not a de Polignac number, because 43523113513 - 2¹ = 43523113511 is a prime.

It is a super-2 number, since 2×43523113513² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43523113511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5183923 + ... + 5192311.

It is an arithmetic number, because the mean of its divisors is an integer number (2033673075).

Almost surely, 2^43523113513 is an apocalyptic number.

It is an amenable number.

43523113513 is a deficient number, since it is larger than the sum of its proper divisors (5285040287).

43523113513 is a wasteful number, since it uses less digits than its factorization.

43523113513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9273 (or 9262 counting only the distinct ones).

The product of its digits is 16200, while the sum is 31.

The spelling of 43523113513 in words is "forty-three billion, five hundred twenty-three million, one hundred thirteen thousand, five hundred thirteen".