43162561 has 4 divisors (see below), whose sum is σ = 46482772. Its totient is φ = 39842352.

The previous prime is 43162549. The next prime is 43162579. The reversal of 43162561 is 16526134.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22505536 + 20657025 = 4744^2 + 4545^2 .

It is a cyclic number.

It is not a de Polignac number, because 43162561 - 2¹³ = 43154369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43162501) 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, 1660086 + ... + 1660111.

It is an arithmetic number, because the mean of its divisors is an integer number (11620693).

Almost surely, 2^43162561 is an apocalyptic number.

It is an amenable number.

43162561 is a deficient number, since it is larger than the sum of its proper divisors (3320211).

43162561 is a wasteful number, since it uses less digits than its factorization.

43162561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3320210.

The product of its digits is 4320, while the sum is 28.

The square root of 43162561 is about 6569.8219915002. The cubic root of 43162561 is about 350.7807360487.

Adding to 43162561 its reverse (16526134), we get a palindrome (59688695).

The spelling of 43162561 in words is "forty-three million, one hundred sixty-two thousand, five hundred sixty-one".