161055133 has 2 divisors, whose sum is σ = 161055134. Its totient is φ = 161055132.

The previous prime is 161055121. The next prime is 161055149. The reversal of 161055133 is 331550161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114447204 + 46607929 = 10698^2 + 6827^2 .

It is a cyclic number.

It is not a de Polignac number, because 161055133 - 2⁵ = 161055101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161055098 and 161055107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161055173) 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, 80527566 + 80527567.

It is an arithmetic number, because the mean of its divisors is an integer number (80527567).

Almost surely, 2^161055133 is an apocalyptic number.

It is an amenable number.

161055133 is a deficient number, since it is larger than the sum of its proper divisors (1).

161055133 is an equidigital number, since it uses as much as digits as its factorization.

161055133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 161055133 is about 12690.7498990406. The cubic root of 161055133 is about 544.0742728121.

The spelling of 161055133 in words is "one hundred sixty-one million, fifty-five thousand, one hundred thirty-three".