161032031 has 2 divisors, whose sum is σ = 161032032. Its totient is φ = 161032030.

The previous prime is 161032019. The next prime is 161032043. The reversal of 161032031 is 130230161.

It is a balanced prime because it is at equal distance from previous prime (161032019) and next prime (161032043).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161032031 is a prime.

It is a super-2 number, since 2×161032031² = 51862630015969922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161232031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80516015 + 80516016.

It is an arithmetic number, because the mean of its divisors is an integer number (80516016).

Almost surely, 2^161032031 is an apocalyptic number.

161032031 is a deficient number, since it is larger than the sum of its proper divisors (1).

161032031 is an equidigital number, since it uses as much as digits as its factorization.

161032031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 161032031 is about 12689.8396758982. The cubic root of 161032031 is about 544.0482572801.

Adding to 161032031 its reverse (130230161), we get a palindrome (291262192).

The spelling of 161032031 in words is "one hundred sixty-one million, thirty-two thousand, thirty-one".