212216531280 has 480 divisors, whose sum is σ = 752866099200. Its totient is φ = 49290688512.

The previous prime is 212216531257. The next prime is 212216531281. The reversal of 212216531280 is 82135612212.

It is a super-2 number, since 2×212216531280² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212216531281) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 295154761 + ... + 295155479.

It is an arithmetic number, because the mean of its divisors is an integer number (1568471040).

Almost surely, 2^212216531280 is an apocalyptic number.

212216531280 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 212216531280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (376433049600).

212216531280 is an abundant number, since it is smaller than the sum of its proper divisors (540649567920).

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

212216531280 is a wasteful number, since it uses less digits than its factorization.

212216531280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163 (or 1144 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The spelling of 212216531280 in words is "two hundred twelve billion, two hundred sixteen million, five hundred thirty-one thousand, two hundred eighty".