212027917551 has 8 divisors (see below), whose sum is σ = 282780872880. Its totient is φ = 141313453632.

The previous prime is 212027917547. The next prime is 212027917603. The reversal of 212027917551 is 155719720212.

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

It is not a de Polignac number, because 212027917551 - 2² = 212027917547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212027917351) 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, 9609996 + ... + 9632033.

It is an arithmetic number, because the mean of its divisors is an integer number (35347609110).

Almost surely, 2^212027917551 is an apocalyptic number.

212027917551 is a deficient number, since it is larger than the sum of its proper divisors (70752955329).

212027917551 is a wasteful number, since it uses less digits than its factorization.

212027917551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19245705.

The product of its (nonzero) digits is 88200, while the sum is 42.

The spelling of 212027917551 in words is "two hundred twelve billion, twenty-seven million, nine hundred seventeen thousand, five hundred fifty-one".