51556644000212 has 24 divisors (see below), whose sum is σ = 97207267269000. Its totient is φ = 23784886935936.

The previous prime is 51556644000209. The next prime is 51556644000263. The reversal of 51556644000212 is 21200044665515.

It can be written as a sum of positive squares in 4 ways, for example, as 3543746010256 + 48012897989956 = 1882484^2 + 6929134^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51556644000212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218364587 + ... + 218600562.

It is an arithmetic number, because the mean of its divisors is an integer number (4050302802875).

Almost surely, 2^{51556644000212} is an apocalyptic number.

51556644000212 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

51556644000212 is a deficient number, since it is larger than the sum of its proper divisors (45650623268788).

51556644000212 is a wasteful number, since it uses less digits than its factorization.

51556644000212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436967435 (or 436967433 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 41.

Adding to 51556644000212 its reverse (21200044665515), we get a palindrome (72756688665727).

The spelling of 51556644000212 in words is "fifty-one trillion, five hundred fifty-six billion, six hundred forty-four million, two hundred twelve", and thus it is an aban number.