43252521 has 16 divisors (see below), whose sum is σ = 62287680. Its totient is φ = 26539200.

The previous prime is 43252513. The next prime is 43252529. The reversal of 43252521 is 12525234.

It is an interprime number because it is at equal distance from previous prime (43252513) and next prime (43252529).

It is not a de Polignac number, because 43252521 - 2³ = 43252513 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 43252491 and 43252500.

It is not an unprimeable number, because it can be changed into a prime (43252529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13746 + ... + 16596.

It is an arithmetic number, because the mean of its divisors is an integer number (3892980).

Almost surely, 2^43252521 is an apocalyptic number.

It is an amenable number.

43252521 is a deficient number, since it is larger than the sum of its proper divisors (19035159).

43252521 is a wasteful number, since it uses less digits than its factorization.

43252521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3256.

The product of its digits is 2400, while the sum is 24.

The square root of 43252521 is about 6576.6648842708. The cubic root of 43252521 is about 351.0242676057.

Adding to 43252521 its reverse (12525234), we get a palindrome (55777755).

It can be divided in two parts, 4 and 3252521, that added together give a triangular number (3252525 = T₂₅₅₀).

The spelling of 43252521 in words is "forty-three million, two hundred fifty-two thousand, five hundred twenty-one".