212878207500 has 240 divisors, whose sum is σ = 751097571840. Its totient is φ = 45795456000.

The previous prime is 212878207471. The next prime is 212878207501. The reversal of 212878207500 is 5702878212.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (212878207501) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 773241 + ... + 1011759.

It is an arithmetic number, because the mean of its divisors is an integer number (3129573216).

Almost surely, 2^212878207500 is an apocalyptic number.

212878207500 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 212878207500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (375548785920).

212878207500 is an abundant number, since it is smaller than the sum of its proper divisors (538219364340).

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

212878207500 is a wasteful number, since it uses less digits than its factorization.

212878207500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238570 (or 238553 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 42.

The spelling of 212878207500 in words is "two hundred twelve billion, eight hundred seventy-eight million, two hundred seven thousand, five hundred".