211057161 has 32 divisors (see below), whose sum is σ = 329625600. Its totient is φ = 120071952.

The previous prime is 211057123. The next prime is 211057241. The reversal of 211057161 is 161750112.

It is not a de Polignac number, because 211057161 - 2⁶ = 211057097 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (211059161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 455616 + ... + 456078.

It is an arithmetic number, because the mean of its divisors is an integer number (10300800).

Almost surely, 2^211057161 is an apocalyptic number.

211057161 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

211057161 is a deficient number, since it is larger than the sum of its proper divisors (118568439).

211057161 is an equidigital number, since it uses as much as digits as its factorization.

211057161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930 (or 916 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 24.

The square root of 211057161 is about 14527.8064758586. The cubic root of 211057161 is about 595.3879361712.

The spelling of 211057161 in words is "two hundred eleven million, fifty-seven thousand, one hundred sixty-one".