212969218 has 32 divisors (see below), whose sum is σ = 399904128. Its totient is φ = 82636800.

The previous prime is 212969201. The next prime is 212969219. The reversal of 212969218 is 812969212.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (212969219) 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, 36888 + ... + 42268.

It is an arithmetic number, because the mean of its divisors is an integer number (12497004).

Almost surely, 2^212969218 is an apocalyptic number.

212969218 is a deficient number, since it is larger than the sum of its proper divisors (186934910).

212969218 is a wasteful number, since it uses less digits than its factorization.

212969218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5658.

The product of its digits is 31104, while the sum is 40.

The square root of 212969218 is about 14593.4649072796. The cubic root of 212969218 is about 597.1804917461.

The spelling of 212969218 in words is "two hundred twelve million, nine hundred sixty-nine thousand, two hundred eighteen".