161835031 has 2 divisors, whose sum is σ = 161835032. Its totient is φ = 161835030.

The previous prime is 161835017. The next prime is 161835041. The reversal of 161835031 is 130538161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161835031 - 2⁷ = 161834903 is a prime.

It is a super-2 number, since 2×161835031² = 52381154517541922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161835001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80917515 + 80917516.

It is an arithmetic number, because the mean of its divisors is an integer number (80917516).

Almost surely, 2^161835031 is an apocalyptic number.

161835031 is a deficient number, since it is larger than the sum of its proper divisors (1).

161835031 is an equidigital number, since it uses as much as digits as its factorization.

161835031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 161835031 is about 12721.4398163101. The cubic root of 161835031 is about 544.9510726775.

The spelling of 161835031 in words is "one hundred sixty-one million, eight hundred thirty-five thousand, thirty-one".