212305452 has 48 divisors (see below), whose sum is σ = 529976160. Its totient is φ = 65912832.

The previous prime is 212305399. The next prime is 212305459. The reversal of 212305452 is 254503212.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (212305459) 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 15 ways as a sum of consecutive naturals, for example, 14424 + ... + 25152.

It is an arithmetic number, because the mean of its divisors is an integer number (11041170).

Almost surely, 2^212305452 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 212305452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264988080).

212305452 is an abundant number, since it is smaller than the sum of its proper divisors (317670708).

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

212305452 is a wasteful number, since it uses less digits than its factorization.

212305452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10850 (or 10848 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 212305452 is about 14570.7052677624. The cubic root of 212305452 is about 596.5594307384.

Adding to 212305452 its reverse (254503212), we get a palindrome (466808664).

The spelling of 212305452 in words is "two hundred twelve million, three hundred five thousand, four hundred fifty-two".