551322211212 has 72 divisors (see below), whose sum is σ = 1447804053696. Its totient is φ = 183447469008.

The previous prime is 551322211207. The next prime is 551322211249. The reversal of 551322211212 is 212112223155.

551322211212 is a `hidden beast` number, since 5 + 513 + 2 + 2 + 21 + 121 + 2 = 666.

It is a super-3 number, since 3×551322211212³ (a number of 36 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43503 + ... + 1050969.

Almost surely, 2^551322211212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551322211212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (723902026848).

551322211212 is an abundant number, since it is smaller than the sum of its proper divisors (896481842484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

551322211212 is a wasteful number, since it uses less digits than its factorization.

551322211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008049 (or 1008035 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

Adding to 551322211212 its reverse (212112223155), we get a palindrome (763434434367).

The spelling of 551322211212 in words is "five hundred fifty-one billion, three hundred twenty-two million, two hundred eleven thousand, two hundred twelve".