51105542215 has 16 divisors (see below), whose sum is σ = 75478955328. Its totient is φ = 32348123136.

The previous prime is 51105542209. The next prime is 51105542219. The reversal of 51105542215 is 51224550115.

It is not a de Polignac number, because 51105542215 - 2³ = 51105542207 is a prime.

It is a super-2 number, since 2×51105542215² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51105542219) 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, 56159482 + ... + 56160391.

It is an arithmetic number, because the mean of its divisors is an integer number (4717434708).

Almost surely, 2^51105542215 is an apocalyptic number.

51105542215 is a deficient number, since it is larger than the sum of its proper divisors (24373413113).

51105542215 is a wasteful number, since it uses less digits than its factorization.

51105542215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112319898.

The product of its (nonzero) digits is 10000, while the sum is 31.

The spelling of 51105542215 in words is "fifty-one billion, one hundred five million, five hundred forty-two thousand, two hundred fifteen".