43825013 has 4 divisors (see below), whose sum is σ = 44379840. Its totient is φ = 43270188.

The previous prime is 43824973. The next prime is 43825037. The reversal of 43825013 is 31052834.

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: 31052834 = 2 ⋅15526417.

It is a cyclic number.

It is not a de Polignac number, because 43825013 - 2¹⁶ = 43759477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43825073) 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, 277295 + ... + 277452.

It is an arithmetic number, because the mean of its divisors is an integer number (11094960).

Almost surely, 2^43825013 is an apocalyptic number.

It is an amenable number.

43825013 is a deficient number, since it is larger than the sum of its proper divisors (554827).

43825013 is an equidigital number, since it uses as much as digits as its factorization.

43825013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554826.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 43825013 is about 6620.0462989318. The cubic root of 43825013 is about 352.5662079082.

Adding to 43825013 its reverse (31052834), we get a palindrome (74877847).

The spelling of 43825013 in words is "forty-three million, eight hundred twenty-five thousand, thirteen".