211660053 has 16 divisors (see below), whose sum is σ = 321255936. Its totient is φ = 122701040.

The previous prime is 211660051. The next prime is 211660079. The reversal of 211660053 is 350066112.

It is not a de Polignac number, because 211660053 - 2¹ = 211660051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211660051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138675 + ... + 140192.

It is an arithmetic number, because the mean of its divisors is an integer number (20078496).

Almost surely, 2^211660053 is an apocalyptic number.

211660053 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

211660053 is a deficient number, since it is larger than the sum of its proper divisors (109595883).

211660053 is a wasteful number, since it uses less digits than its factorization.

211660053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278904.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 211660053 is about 14548.5412670824. The cubic root of 211660053 is about 595.9543125572.

It can be divided in two parts, 2116600 and 53, that added together give a triangular number (2116653 = T₂₀₅₇).

The spelling of 211660053 in words is "two hundred eleven million, six hundred sixty thousand, fifty-three".