212943855 has 16 divisors (see below), whose sum is σ = 344085984. Its totient is φ = 112444800.

The previous prime is 212943851. The next prime is 212943859. The reversal of 212943855 is 558349212.

It is an interprime number because it is at equal distance from previous prime (212943851) and next prime (212943859).

It is not a de Polignac number, because 212943855 - 2² = 212943851 is a prime.

It is a super-2 number, since 2×212943855² = 90690170764522050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212943851) 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, 68764 + ... + 71793.

It is an arithmetic number, because the mean of its divisors is an integer number (21505374).

Almost surely, 2^212943855 is an apocalyptic number.

212943855 is a deficient number, since it is larger than the sum of its proper divisors (131142129).

212943855 is a wasteful number, since it uses less digits than its factorization.

212943855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140666.

The product of its digits is 86400, while the sum is 39.

The square root of 212943855 is about 14592.5958965497. The cubic root of 212943855 is about 597.1567842666.

The spelling of 212943855 in words is "two hundred twelve million, nine hundred forty-three thousand, eight hundred fifty-five".