43045521 has 4 divisors (see below), whose sum is σ = 57394032. Its totient is φ = 28697012.

The previous prime is 43045511. The next prime is 43045553. The reversal of 43045521 is 12554034.

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 43045521 - 2¹³ = 43037329 is a prime.

It is a super-2 number, since 2×43045521² = 3705833756322882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43045491 and 43045500.

It is not an unprimeable number, because it can be changed into a prime (43045511) 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, 7174251 + ... + 7174256.

It is an arithmetic number, because the mean of its divisors is an integer number (14348508).

Almost surely, 2^43045521 is an apocalyptic number.

It is an amenable number.

43045521 is a deficient number, since it is larger than the sum of its proper divisors (14348511).

43045521 is a wasteful number, since it uses less digits than its factorization.

43045521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14348510.

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

The square root of 43045521 is about 6560.9085498885. The cubic root of 43045521 is about 350.4633889380.

Adding to 43045521 its reverse (12554034), we get a palindrome (55599555).

The spelling of 43045521 in words is "forty-three million, forty-five thousand, five hundred twenty-one".