212204322551 has 6 divisors (see below), whose sum is σ = 229783379040. Its totient is φ = 195880912968.

The previous prime is 212204322541. The next prime is 212204322593. The reversal of 212204322551 is 155223402212.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-212204322551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212204322541) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 627823271 + ... + 627823608.

It is an arithmetic number, because the mean of its divisors is an integer number (38297229840).

Almost surely, 2^212204322551 is an apocalyptic number.

212204322551 is a deficient number, since it is larger than the sum of its proper divisors (17579056489).

212204322551 is a wasteful number, since it uses less digits than its factorization.

212204322551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255646905 (or 1255646892 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 212204322551 its reverse (155223402212), we get a palindrome (367427724763).

The spelling of 212204322551 in words is "two hundred twelve billion, two hundred four million, three hundred twenty-two thousand, five hundred fifty-one".