51417855 has 32 divisors (see below), whose sum is σ = 92160000. Its totient is φ = 27197856.

The previous prime is 51417853. The next prime is 51417889. The reversal of 51417855 is 55871415.

It is not a de Polignac number, because 51417855 - 2¹ = 51417853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51417853) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15646 + ... + 18644.

It is an arithmetic number, because the mean of its divisors is an integer number (2880000).

Almost surely, 2^51417855 is an apocalyptic number.

51417855 is a deficient number, since it is larger than the sum of its proper divisors (40742145).

51417855 is a wasteful number, since it uses less digits than its factorization.

51417855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3140 (or 3134 counting only the distinct ones).

The product of its digits is 28000, while the sum is 36.

The square root of 51417855 is about 7170.6244497952. The cubic root of 51417855 is about 371.8530246648.

It can be divided in two parts, 5141 and 7855, that added together give a square (12996 = 114²).

The spelling of 51417855 in words is "fifty-one million, four hundred seventeen thousand, eight hundred fifty-five".