43525013 has 4 divisors (see below), whose sum is σ = 49742880. Its totient is φ = 37307148.

The previous prime is 43525003. The next prime is 43525033. The reversal of 43525013 is 31052534.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31052534 = 2 ⋅15526267.

It is a cyclic number.

It is not a de Polignac number, because 43525013 - 2⁸ = 43524757 is a prime.

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 43525013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43525003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3108923 + ... + 3108936.

It is an arithmetic number, because the mean of its divisors is an integer number (12435720).

Almost surely, 2^43525013 is an apocalyptic number.

It is an amenable number.

43525013 is a deficient number, since it is larger than the sum of its proper divisors (6217867).

43525013 is an equidigital number, since it uses as much as digits as its factorization.

43525013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6217866.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 43525013 is about 6597.3489372626. The cubic root of 43525013 is about 351.7598789570.

Adding to 43525013 its reverse (31052534), we get a palindrome (74577547).

The spelling of 43525013 in words is "forty-three million, five hundred twenty-five thousand, thirteen".