212516835551 has 8 divisors (see below), whose sum is σ = 215229788400. Its totient is φ = 209817760320.

The previous prime is 212516835539. The next prime is 212516835577. The reversal of 212516835551 is 155538615212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212516835551 is a prime.

It is a super-2 number, since 2×212516835551² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212516835851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3438581 + ... + 3499838.

It is an arithmetic number, because the mean of its divisors is an integer number (26903723550).

Almost surely, 2^212516835551 is an apocalyptic number.

212516835551 is a deficient number, since it is larger than the sum of its proper divisors (2712952849).

212516835551 is a wasteful number, since it uses less digits than its factorization.

212516835551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6938809.

The product of its digits is 360000, while the sum is 44.

The spelling of 212516835551 in words is "two hundred twelve billion, five hundred sixteen million, eight hundred thirty-five thousand, five hundred fifty-one".