51555202212 has 48 divisors (see below), whose sum is σ = 123344750592. Its totient is φ = 16752372000.

The previous prime is 51555202211. The next prime is 51555202217. The reversal of 51555202212 is 21220255515.

It is a self number, because there is not a number n which added to its sum of digits gives 51555202212.

It is not an unprimeable number, because it can be changed into a prime (51555202211) 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, 40528 + ... + 323655.

It is an arithmetic number, because the mean of its divisors is an integer number (2569682304).

Almost surely, 2^51555202212 is an apocalyptic number.

It is an amenable number.

51555202212 is an abundant number, since it is smaller than the sum of its proper divisors (71789548380).

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

51555202212 is a wasteful number, since it uses less digits than its factorization.

51555202212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364488 (or 364486 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 30.

Adding to 51555202212 its reverse (21220255515), we get a palindrome (72775457727).

The spelling of 51555202212 in words is "fifty-one billion, five hundred fifty-five million, two hundred two thousand, two hundred twelve".