55530312212 has 12 divisors (see below), whose sum is σ = 97821610656. Its totient is φ = 27581280600.

The previous prime is 55530312199. The next prime is 55530312221. The reversal of 55530312212 is 21221303555.

It is a super-3 number, since 3×55530312212³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45968198 + ... + 45969405.

It is an arithmetic number, because the mean of its divisors is an integer number (8151800888).

Almost surely, 2^55530312212 is an apocalyptic number.

It is an amenable number.

55530312212 is a deficient number, since it is larger than the sum of its proper divisors (42291298444).

55530312212 is a wasteful number, since it uses less digits than its factorization.

55530312212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91937758 (or 91937756 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

Adding to 55530312212 its reverse (21221303555), we get a palindrome (76751615767).

The spelling of 55530312212 in words is "fifty-five billion, five hundred thirty million, three hundred twelve thousand, two hundred twelve".