8161031 has 2 divisors, whose sum is σ = 8161032. Its totient is φ = 8161030.

The previous prime is 8161001. The next prime is 8161039. The reversal of 8161031 is 1301618.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8161031 - 2¹⁸ = 7898887 is a prime.

It is a super-2 number, since 2×8161031² = 133204853965922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8160994 and 8161012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8161039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4080515 + 4080516.

It is an arithmetic number, because the mean of its divisors is an integer number (4080516).

Almost surely, 2^8161031 is an apocalyptic number.

8161031 is a deficient number, since it is larger than the sum of its proper divisors (1).

8161031 is an equidigital number, since it uses as much as digits as its factorization.

8161031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 8161031 is about 2856.7518268131. The cubic root of 8161031 is about 201.3330205420. Note that the first 3 decimals are identical.

Adding to 8161031 its reverse (1301618), we get a palindrome (9462649).

The spelling of 8161031 in words is "eight million, one hundred sixty-one thousand, thirty-one".