211170993 has 16 divisors (see below), whose sum is σ = 307509696. Its totient is φ = 127835840.

The previous prime is 211170983. The next prime is 211171001. The reversal of 211170993 is 399071112.

211170993 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 211170993 - 2⁵ = 211170961 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (211170913) 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, 30271 + ... + 36587.

It is an arithmetic number, because the mean of its divisors is an integer number (19219356).

Almost surely, 2^211170993 is an apocalyptic number.

It is an amenable number.

211170993 is a deficient number, since it is larger than the sum of its proper divisors (96338703).

211170993 is a wasteful number, since it uses less digits than its factorization.

211170993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7344.

The product of its (nonzero) digits is 3402, while the sum is 33.

The square root of 211170993 is about 14531.7236761507. The cubic root of 211170993 is about 595.4949561816.

The spelling of 211170993 in words is "two hundred eleven million, one hundred seventy thousand, nine hundred ninety-three".