161031419 has 2 divisors, whose sum is σ = 161031420. Its totient is φ = 161031418.

The previous prime is 161031389. The next prime is 161031421. The reversal of 161031419 is 914130161.

161031419 is nontrivially palindromic in base 15.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161031419 - 2⁸ = 161031163 is a prime.

It is a super-2 number, since 2×161031419² = 51862235810307122, which contains 22 as substring.

Together with 161031421, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (161031499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80515709 + 80515710.

It is an arithmetic number, because the mean of its divisors is an integer number (80515710).

Almost surely, 2^161031419 is an apocalyptic number.

161031419 is a deficient number, since it is larger than the sum of its proper divisors (1).

161031419 is an equidigital number, since it uses as much as digits as its factorization.

161031419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 161031419 is about 12689.8155620955. The cubic root of 161031419 is about 544.0475680633.

The spelling of 161031419 in words is "one hundred sixty-one million, thirty-one thousand, four hundred nineteen".