161074213 has 4 divisors (see below), whose sum is σ = 161099820. Its totient is φ = 161048608.

The previous prime is 161074183. The next prime is 161074219. The reversal of 161074213 is 312470161.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 312470161 = 1181 ⋅264581.

It can be written as a sum of positive squares in 2 ways, for example, as 20367169 + 140707044 = 4513^2 + 11862^2 .

It is a cyclic number.

It is not a de Polignac number, because 161074213 - 2¹⁷ = 160943141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161074219) 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 in 3 ways as a sum of consecutive naturals, for example, 3873 + ... + 18361.

It is an arithmetic number, because the mean of its divisors is an integer number (40274955).

Almost surely, 2^161074213 is an apocalyptic number.

It is an amenable number.

161074213 is a deficient number, since it is larger than the sum of its proper divisors (25607).

161074213 is a wasteful number, since it uses less digits than its factorization.

161074213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25606.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 161074213 is about 12691.5016054051. The cubic root of 161074213 is about 544.0957572297.

The spelling of 161074213 in words is "one hundred sixty-one million, seventy-four thousand, two hundred thirteen".