43161431 has 2 divisors, whose sum is σ = 43161432. Its totient is φ = 43161430.

The previous prime is 43161401. The next prime is 43161449. The reversal of 43161431 is 13416134.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43161431 - 2¹⁰ = 43160407 is a prime.

It is a super-2 number, since 2×43161431² = 3725818251935522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 43161397 and 43161406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43161401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21580715 + 21580716.

It is an arithmetic number, because the mean of its divisors is an integer number (21580716).

Almost surely, 2^43161431 is an apocalyptic number.

43161431 is a deficient number, since it is larger than the sum of its proper divisors (1).

43161431 is an equidigital number, since it uses as much as digits as its factorization.

43161431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 23.

The square root of 43161431 is about 6569.7359916514. The cubic root of 43161431 is about 350.7776748642. Note that the first 3 decimals are identical.

Adding to 43161431 its reverse (13416134), we get a palindrome (56577565).

The spelling of 43161431 in words is "forty-three million, one hundred sixty-one thousand, four hundred thirty-one".