212170071 has 4 divisors (see below), whose sum is σ = 282893432. Its totient is φ = 141446712.

The previous prime is 212170001. The next prime is 212170073. The reversal of 212170071 is 170071212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 212170071 - 2¹⁴ = 212153687 is a prime.

It is a super-2 number, since 2×212170071² = 90032278056290082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212170073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35361676 + ... + 35361681.

It is an arithmetic number, because the mean of its divisors is an integer number (70723358).

Almost surely, 2^212170071 is an apocalyptic number.

212170071 is a deficient number, since it is larger than the sum of its proper divisors (70723361).

212170071 is an equidigital number, since it uses as much as digits as its factorization.

212170071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70723360.

The product of its (nonzero) digits is 196, while the sum is 21.

The square root of 212170071 is about 14566.0588698522. The cubic root of 212170071 is about 596.4326009211.

The spelling of 212170071 in words is "two hundred twelve million, one hundred seventy thousand, seventy-one".