51218046 has 24 divisors (see below), whose sum is σ = 121061304. Its totient is φ = 15520560.

The previous prime is 51218029. The next prime is 51218081. The reversal of 51218046 is 64081215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 129141 + ... + 129536.

It is an arithmetic number, because the mean of its divisors is an integer number (5044221).

Almost surely, 2^51218046 is an apocalyptic number.

51218046 is an abundant number, since it is smaller than the sum of its proper divisors (69843258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51218046 is a wasteful number, since it uses less digits than its factorization.

51218046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258696 (or 258693 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 51218046 is about 7156.6784194904. The cubic root of 51218046 is about 371.3707276646.

The spelling of 51218046 in words is "fifty-one million, two hundred eighteen thousand, forty-six".