212512818 has 64 divisors (see below), whose sum is σ = 516354048. Its totient is φ = 56920320.

The previous prime is 212512789. The next prime is 212512819. The reversal of 212512818 is 818215212.

It is a super-2 number, since 2×212512818² = 90323395628602248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212512819) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 261633 + ... + 262443.

It is an arithmetic number, because the mean of its divisors is an integer number (8068032).

Almost surely, 2^212512818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212512818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258177024).

212512818 is an abundant number, since it is smaller than the sum of its proper divisors (303841230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212512818 is a wasteful number, since it uses less digits than its factorization.

212512818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207.

The product of its digits is 2560, while the sum is 30.

The square root of 212512818 is about 14577.8193842563. The cubic root of 212512818 is about 596.7535942068.

The spelling of 212512818 in words is "two hundred twelve million, five hundred twelve thousand, eight hundred eighteen".