51015552211 has 8 divisors (see below), whose sum is σ = 55289762864. Its totient is φ = 46791332640.

The previous prime is 51015552209. The next prime is 51015552221. The reversal of 51015552211 is 11225551015.

51015552211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51015552211 - 2¹ = 51015552209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51015552211.

It is not an unprimeable number, because it can be changed into a prime (51015552221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12495645 + ... + 12499726.

It is an arithmetic number, because the mean of its divisors is an integer number (6911220358).

Almost surely, 2^51015552211 is an apocalyptic number.

51015552211 is a deficient number, since it is larger than the sum of its proper divisors (4274210653).

51015552211 is a wasteful number, since it uses less digits than its factorization.

51015552211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24995541.

The product of its (nonzero) digits is 2500, while the sum is 28.

The spelling of 51015552211 in words is "fifty-one billion, fifteen million, five hundred fifty-two thousand, two hundred eleven".