43122561 has 4 divisors (see below), whose sum is σ = 57496752. Its totient is φ = 28748372.

The previous prime is 43122551. The next prime is 43122577. The reversal of 43122561 is 16522134.

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 43122561 - 2⁷ = 43122433 is a prime.

It is a super-3 number, since 3×43122561³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (43122551) 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, 7187091 + ... + 7187096.

It is an arithmetic number, because the mean of its divisors is an integer number (14374188).

Almost surely, 2^43122561 is an apocalyptic number.

It is an amenable number.

43122561 is a deficient number, since it is larger than the sum of its proper divisors (14374191).

43122561 is a wasteful number, since it uses less digits than its factorization.

43122561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14374190.

The product of its digits is 1440, while the sum is 24.

The square root of 43122561 is about 6566.7770633698. Note that the first 3 decimals coincide. The cubic root of 43122561 is about 350.6723429897.

Adding to 43122561 its reverse (16522134), we get a palindrome (59644695).

The spelling of 43122561 in words is "forty-three million, one hundred twenty-two thousand, five hundred sixty-one".