213056161 has 4 divisors (see below), whose sum is σ = 216057024. Its totient is φ = 210055300.

The previous prime is 213056147. The next prime is 213056183. The reversal of 213056161 is 161650312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213056161 - 2⁷ = 213056033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213056111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1500325 + ... + 1500466.

It is an arithmetic number, because the mean of its divisors is an integer number (54014256).

Almost surely, 2^213056161 is an apocalyptic number.

It is an amenable number.

213056161 is a deficient number, since it is larger than the sum of its proper divisors (3000863).

213056161 is an equidigital number, since it uses as much as digits as its factorization.

213056161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3000862.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 213056161 is about 14596.4434366732. The cubic root of 213056161 is about 597.2617454287.

The spelling of 213056161 in words is "two hundred thirteen million, fifty-six thousand, one hundred sixty-one".