212164556 has 12 divisors (see below), whose sum is σ = 393128568. Its totient is φ = 99842112.

The previous prime is 212164529. The next prime is 212164559. The reversal of 212164556 is 655461212.

It is not an unprimeable number, because it can be changed into a prime (212164559) 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, 1559966 + ... + 1560101.

It is an arithmetic number, because the mean of its divisors is an integer number (32760714).

Almost surely, 2^212164556 is an apocalyptic number.

It is an amenable number.

212164556 is a deficient number, since it is larger than the sum of its proper divisors (180964012).

212164556 is a wasteful number, since it uses less digits than its factorization.

212164556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3120088 (or 3120086 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 212164556 is about 14565.8695586635. The cubic root of 212164556 is about 596.4274331261.

The spelling of 212164556 in words is "two hundred twelve million, one hundred sixty-four thousand, five hundred fifty-six".