51210551655542 has 32 divisors (see below), whose sum is σ = 80621022470400. Its totient is φ = 24349811824800.

The previous prime is 51210551655521. The next prime is 51210551655583. The reversal of 51210551655542 is 24555615501215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 524375417 + ... + 524473067.

It is an arithmetic number, because the mean of its divisors is an integer number (2519406952200).

Almost surely, 2^{51210551655542} is an apocalyptic number.

51210551655542 is a deficient number, since it is larger than the sum of its proper divisors (29410470814858).

51210551655542 is a wasteful number, since it uses less digits than its factorization.

51210551655542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163748.

The product of its (nonzero) digits is 1500000, while the sum is 47.

The spelling of 51210551655542 in words is "fifty-one trillion, two hundred ten billion, five hundred fifty-one million, six hundred fifty-five thousand, five hundred forty-two".