212305152516 has 12 divisors (see below), whose sum is σ = 495378689232. Its totient is φ = 70768384168.

The previous prime is 212305152497. The next prime is 212305152523. The reversal of 212305152516 is 615251503212.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×212305152516² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8846048010 + ... + 8846048033.

It is an arithmetic number, because the mean of its divisors is an integer number (41281557436).

Almost surely, 2^212305152516 is an apocalyptic number.

It is an amenable number.

212305152516 is an abundant number, since it is smaller than the sum of its proper divisors (283073536716).

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

212305152516 is a wasteful number, since it uses less digits than its factorization.

212305152516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17692096050 (or 17692096048 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 33.

Adding to 212305152516 its reverse (615251503212), we get a palindrome (827556655728).

The spelling of 212305152516 in words is "two hundred twelve billion, three hundred five million, one hundred fifty-two thousand, five hundred sixteen".