212162005 has 48 divisors (see below), whose sum is σ = 297239040. Its totient is φ = 144967680.

The previous prime is 212161997. The next prime is 212162011. The reversal of 212162005 is 500261212.

212162005 = 173² + 174² + ... + 862².

It is not a de Polignac number, because 212162005 - 2³ = 212161997 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1099189 + ... + 1099381.

It is an arithmetic number, because the mean of its divisors is an integer number (6192480).

Almost surely, 2^212162005 is an apocalyptic number.

It is an amenable number.

212162005 is a deficient number, since it is larger than the sum of its proper divisors (85077035).

212162005 is a wasteful number, since it uses less digits than its factorization.

212162005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 212162005 is about 14565.7819906794. The cubic root of 212162005 is about 596.4250426978.

The spelling of 212162005 in words is "two hundred twelve million, one hundred sixty-two thousand, five".