211685061 has 16 divisors (see below), whose sum is σ = 339545600. Its totient is φ = 114596208.

The previous prime is 211685059. The next prime is 211685083. The reversal of 211685061 is 160586112.

211685061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 211685061 - 2¹ = 211685059 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 (211685011) 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, 264871 + ... + 265668.

It is an arithmetic number, because the mean of its divisors is an integer number (21221600).

Almost surely, 2^211685061 is an apocalyptic number.

211685061 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

211685061 is a deficient number, since it is larger than the sum of its proper divisors (127860539).

211685061 is a wasteful number, since it uses less digits than its factorization.

211685061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530568.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 211685061 is about 14549.4007093076. The cubic root of 211685061 is about 595.9777826425.

The spelling of 211685061 in words is "two hundred eleven million, six hundred eighty-five thousand, sixty-one".