212215006551 has 16 divisors (see below), whose sum is σ = 283946372864. Its totient is φ = 140980388544.

The previous prime is 212215006541. The next prime is 212215006567. The reversal of 212215006551 is 155600512212.

It is not a de Polignac number, because 212215006551 - 2¹⁸ = 212214744407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212215006541) 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, 3930726 + ... + 3984348.

It is an arithmetic number, because the mean of its divisors is an integer number (17746648304).

Almost surely, 2^212215006551 is an apocalyptic number.

212215006551 is a deficient number, since it is larger than the sum of its proper divisors (71731366313).

212215006551 is a wasteful number, since it uses less digits than its factorization.

212215006551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58230.

The product of its (nonzero) digits is 6000, while the sum is 30.

Adding to 212215006551 its reverse (155600512212), we get a palindrome (367815518763).

The spelling of 212215006551 in words is "two hundred twelve billion, two hundred fifteen million, six thousand, five hundred fifty-one".