43272731 has 2 divisors, whose sum is σ = 43272732. Its totient is φ = 43272730.

The previous prime is 43272707. The next prime is 43272737. The reversal of 43272731 is 13727234.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43272731 is a prime.

It is a super-2 number, since 2×43272731² = 3745058496396722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 43272694 and 43272703.

It is not a weakly prime, because it can be changed into another prime (43272737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21636365 + 21636366.

It is an arithmetic number, because the mean of its divisors is an integer number (21636366).

Almost surely, 2^43272731 is an apocalyptic number.

43272731 is a deficient number, since it is larger than the sum of its proper divisors (1).

43272731 is an equidigital number, since it uses as much as digits as its factorization.

43272731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 29.

The square root of 43272731 is about 6578.2011978960. The cubic root of 43272731 is about 351.0789318243.

Adding to 43272731 its reverse (13727234), we get a palindrome (56999965).

The spelling of 43272731 in words is "forty-three million, two hundred seventy-two thousand, seven hundred thirty-one".