212206071 has 16 divisors (see below), whose sum is σ = 352758528. Its totient is φ = 110236800.

The previous prime is 212206069. The next prime is 212206097. The reversal of 212206071 is 170602212.

212206071 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 212206071 - 2¹ = 212206069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212206031) 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, 459090 + ... + 459551.

It is an arithmetic number, because the mean of its divisors is an integer number (22047408).

Almost surely, 2^212206071 is an apocalyptic number.

212206071 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

212206071 is a deficient number, since it is larger than the sum of its proper divisors (140552457).

212206071 is a wasteful number, since it uses less digits than its factorization.

212206071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918662.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 212206071 is about 14567.2945669400. The cubic root of 212206071 is about 596.4663322877.

Adding to 212206071 its reverse (170602212), we get a palindrome (382808283).

The spelling of 212206071 in words is "two hundred twelve million, two hundred six thousand, seventy-one".