212544857517 has 16 divisors (see below), whose sum is σ = 289438609152. Its totient is φ = 138674168640.

The previous prime is 212544857507. The next prime is 212544857521. The reversal of 212544857517 is 715758445212.

It is not a de Polignac number, because 212544857517 - 2²³ = 212536468909 is a prime.

It is a super-3 number, since 3×212544857517³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212544857517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212544857507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3835467 + ... + 3890487.

It is an arithmetic number, because the mean of its divisors is an integer number (18089913072).

Almost surely, 2^212544857517 is an apocalyptic number.

It is an amenable number.

212544857517 is a deficient number, since it is larger than the sum of its proper divisors (76893751635).

212544857517 is a wasteful number, since it uses less digits than its factorization.

212544857517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82468.

The product of its digits is 3136000, while the sum is 51.

The spelling of 212544857517 in words is "two hundred twelve billion, five hundred forty-four million, eight hundred fifty-seven thousand, five hundred seventeen".