212254442652 has 96 divisors (see below), whose sum is σ = 575518332928. Its totient is φ = 59628913344.

The previous prime is 212254442629. The next prime is 212254442657. The reversal of 212254442652 is 256244452212.

212254442652 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×212254442652² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212254442652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212254442657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3044043 + ... + 3112989.

Almost surely, 2^212254442652 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 212254442652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287759166464).

212254442652 is an abundant number, since it is smaller than the sum of its proper divisors (363263890276).

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

212254442652 is a wasteful number, since it uses less digits than its factorization.

212254442652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69575 (or 69573 counting only the distinct ones).

The product of its digits is 307200, while the sum is 39.

Adding to 212254442652 its reverse (256244452212), we get a palindrome (468498894864).

The spelling of 212254442652 in words is "two hundred twelve billion, two hundred fifty-four million, four hundred forty-two thousand, six hundred fifty-two".