43432513 has 4 divisors (see below), whose sum is σ = 43485120. Its totient is φ = 43379908.

The previous prime is 43432507. The next prime is 43432523. The reversal of 43432513 is 31523434.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43432513 - 2⁹ = 43432001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43432523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25045 + ... + 26722.

It is an arithmetic number, because the mean of its divisors is an integer number (10871280).

Almost surely, 2^43432513 is an apocalyptic number.

It is an amenable number.

43432513 is a deficient number, since it is larger than the sum of its proper divisors (52607).

43432513 is an equidigital number, since it uses as much as digits as its factorization.

43432513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52606.

The product of its digits is 4320, while the sum is 25.

The square root of 43432513 is about 6590.3348169877. The cubic root of 43432513 is about 351.5105137932.

Adding to 43432513 its reverse (31523434), we get a palindrome (74955947).

The spelling of 43432513 in words is "forty-three million, four hundred thirty-two thousand, five hundred thirteen".