211713081 has 8 divisors (see below), whose sum is σ = 283975104. Its totient is φ = 140296560.

The previous prime is 211713011. The next prime is 211713113. The reversal of 211713081 is 180317112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 211713081 - 2⁹ = 211712569 is a prime.

It is a super-2 number, since 2×211713081² = 89644857333025122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (211713011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210790 + ... + 211791.

It is an arithmetic number, because the mean of its divisors is an integer number (35496888).

Almost surely, 2^211713081 is an apocalyptic number.

It is an amenable number.

211713081 is a deficient number, since it is larger than the sum of its proper divisors (72262023).

211713081 is a wasteful number, since it uses less digits than its factorization.

211713081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422751.

The product of its (nonzero) digits is 336, while the sum is 24.

The square root of 211713081 is about 14550.3636037042. The cubic root of 211713081 is about 596.0040773035.

The spelling of 211713081 in words is "two hundred eleven million, seven hundred thirteen thousand, eighty-one".