212054220 has 96 divisors (see below), whose sum is σ = 753984000. Its totient is φ = 48468672.

The previous prime is 212054207. The next prime is 212054221. The reversal of 212054220 is 22450212.

212054220 is a `hidden beast` number, since 2 + 120 + 542 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 212054193 and 212054202.

It is not an unprimeable number, because it can be changed into a prime (212054221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24270 + ... + 31829.

It is an arithmetic number, because the mean of its divisors is an integer number (7854000).

Almost surely, 2^212054220 is an apocalyptic number.

212054220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212054220 is an abundant number, since it is smaller than the sum of its proper divisors (541929780).

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

212054220 is a wasteful number, since it uses less digits than its factorization.

212054220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56124 (or 56116 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 212054220 is about 14562.0815819717. The cubic root of 212054220 is about 596.3240246688.

It can be divided in two parts, 21205 and 4220, that added together give a triangular number (25425 = T₂₂₅).

The spelling of 212054220 in words is "two hundred twelve million, fifty-four thousand, two hundred twenty".