212881284 has 360 divisors, whose sum is σ = 750835008. Its totient is φ = 51891840.

The previous prime is 212881271. The next prime is 212881289. The reversal of 212881284 is 482188212.

212881284 = T₇ + T₈ + ... + T₁₀₈₄.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (212881289) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 4016602 + ... + 4016654.

Almost surely, 2^212881284 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212881284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (375417504).

212881284 is an abundant number, since it is smaller than the sum of its proper divisors (537953724).

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

212881284 is a wasteful number, since it uses less digits than its factorization.

212881284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 99 counting only the distinct ones).

The product of its digits is 16384, while the sum is 36.

The square root of 212881284 is about 14590.4518093169. The cubic root of 212881284 is about 597.0982894152.

The spelling of 212881284 in words is "two hundred twelve million, eight hundred eighty-one thousand, two hundred eighty-four".