51550111215 has 96 divisors (see below), whose sum is σ = 91907712000. Its totient is φ = 26721446400.

The previous prime is 51550111157. The next prime is 51550111253. The reversal of 51550111215 is 51211105515.

It is a happy number.

It is not a de Polignac number, because 51550111215 - 2⁷ = 51550111087 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 90597451 + ... + 90598019.

It is an arithmetic number, because the mean of its divisors is an integer number (957372000).

Almost surely, 2^51550111215 is an apocalyptic number.

51550111215 is a deficient number, since it is larger than the sum of its proper divisors (40357600785).

51550111215 is a wasteful number, since it uses less digits than its factorization.

51550111215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997 (or 994 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 27.

The spelling of 51550111215 in words is "fifty-one billion, five hundred fifty million, one hundred eleven thousand, two hundred fifteen".