212881000 has 32 divisors (see below), whose sum is σ = 498143880. Its totient is φ = 85152000.

The previous prime is 212880991. The next prime is 212881013. The reversal of 212881000 is 188212.

It can be written as a sum of positive squares in 4 ways, for example, as 55980324 + 156900676 = 7482^2 + 12526^2 .

It is a super-2 number, since 2×212881000² = 90636640322000000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105441 + ... + 107440.

Almost surely, 2^212881000 is an apocalyptic number.

212881000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212881000 is an abundant number, since it is smaller than the sum of its proper divisors (285262880).

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

212881000 is a wasteful number, since it uses less digits than its factorization.

212881000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212902 (or 212888 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 212881000 is about 14590.4420769215. The cubic root of 212881000 is about 597.0980238901.

The spelling of 212881000 in words is "two hundred twelve million, eight hundred eighty-one thousand".