212281230 has 48 divisors (see below), whose sum is σ = 592658640. Its totient is φ = 48521088.

The previous prime is 212281219. The next prime is 212281301. The reversal of 212281230 is 32182212.

It is a happy number.

It is a super-2 number, since 2×212281230² = 90126641220625800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212281197 and 212281206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70735 + ... + 73674.

It is an arithmetic number, because the mean of its divisors is an integer number (12347055).

Almost surely, 2^212281230 is an apocalyptic number.

212281230 is an abundant number, since it is smaller than the sum of its proper divisors (380377410).

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

212281230 is a wasteful number, since it uses less digits than its factorization.

212281230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144433 (or 144426 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 212281230 is about 14569.8740557357. The cubic root of 212281230 is about 596.5367426539.

The spelling of 212281230 in words is "two hundred twelve million, two hundred eighty-one thousand, two hundred thirty".