212445552 has 40 divisors (see below), whose sum is σ = 598711680. Its totient is φ = 64377280.

The previous prime is 212445547. The next prime is 212445589. The reversal of 212445552 is 255544212.

It is a super-2 number, since 2×212445552² = 90266225129169408, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 200652 + ... + 201707.

It is an arithmetic number, because the mean of its divisors is an integer number (14967792).

Almost surely, 2^212445552 is an apocalyptic number.

212445552 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

212445552 is an abundant number, since it is smaller than the sum of its proper divisors (386266128).

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

212445552 is a wasteful number, since it uses less digits than its factorization.

212445552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402381 (or 402375 counting only the distinct ones).

The product of its digits is 16000, while the sum is 30.

The square root of 212445552 is about 14575.5120664764. The cubic root of 212445552 is about 596.6906247294.

Adding to 212445552 its reverse (255544212), we get a palindrome (467989764).

It can be divided in two parts, 21244 and 5552, that added together give a triangular number (26796 = T₂₃₁).

The spelling of 212445552 in words is "two hundred twelve million, four hundred forty-five thousand, five hundred fifty-two".