212145855 has 16 divisors (see below), whose sum is σ = 339642720. Its totient is φ = 113074688.

The previous prime is 212145853. The next prime is 212145863. The reversal of 212145855 is 558541212.

It is a cyclic number.

It is not a de Polignac number, because 212145855 - 2¹ = 212145853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212145853) 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, 29011 + ... + 35579.

It is an arithmetic number, because the mean of its divisors is an integer number (21227670).

Almost surely, 2^212145855 is an apocalyptic number.

212145855 is a deficient number, since it is larger than the sum of its proper divisors (127496865).

212145855 is a wasteful number, since it uses less digits than its factorization.

212145855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8730.

The product of its digits is 16000, while the sum is 33.

The square root of 212145855 is about 14565.2275986337. The cubic root of 212145855 is about 596.4099088085.

The spelling of 212145855 in words is "two hundred twelve million, one hundred forty-five thousand, eight hundred fifty-five".