212202555400 has 384 divisors, whose sum is σ = 569943164160. Its totient is φ = 72783360000.

The previous prime is 212202555377. The next prime is 212202555451. The reversal of 212202555400 is 4555202212.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 435733957 + ... + 435734443.

It is an arithmetic number, because the mean of its divisors is an integer number (1484226990).

Almost surely, 2^212202555400 is an apocalyptic number.

212202555400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212202555400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284971582080).

212202555400 is an abundant number, since it is smaller than the sum of its proper divisors (357740608760).

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

212202555400 is a wasteful number, since it uses less digits than its factorization.

212202555400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705 (or 696 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 28.

Adding to 212202555400 its reverse (4555202212), we get a palindrome (216757757612).

The spelling of 212202555400 in words is "two hundred twelve billion, two hundred two million, five hundred fifty-five thousand, four hundred".