43772161 has 8 divisors (see below), whose sum is σ = 46570464. Its totient is φ = 40998720.

The previous prime is 43772137. The next prime is 43772167. The reversal of 43772161 is 16127734.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43772161 - 2⁵ = 43772129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43772167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2515 + ... + 9688.

It is an arithmetic number, because the mean of its divisors is an integer number (5821308).

Almost surely, 2^43772161 is an apocalyptic number.

It is an amenable number.

43772161 is a deficient number, since it is larger than the sum of its proper divisors (2798303).

43772161 is a wasteful number, since it uses less digits than its factorization.

43772161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12431.

The product of its digits is 7056, while the sum is 31.

The square root of 43772161 is about 6616.0532797129. The cubic root of 43772161 is about 352.4244218700.

Adding to 43772161 its reverse (16127734), we get a palindrome (59899895).

The spelling of 43772161 in words is "forty-three million, seven hundred seventy-two thousand, one hundred sixty-one".