51938418 has 16 divisors (see below), whose sum is σ = 118716480. Its totient is φ = 14839536.

The previous prime is 51938407. The next prime is 51938441. The reversal of 51938418 is 81483915.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 618273 + ... + 618356.

It is an arithmetic number, because the mean of its divisors is an integer number (7419780).

Almost surely, 2^51938418 is an apocalyptic number.

51938418 is an abundant number, since it is smaller than the sum of its proper divisors (66778062).

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

51938418 is a wasteful number, since it uses less digits than its factorization.

51938418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236641.

The product of its digits is 34560, while the sum is 39.

The square root of 51938418 is about 7206.8313425527. The cubic root of 51938418 is about 373.1037142082.

The spelling of 51938418 in words is "fifty-one million, nine hundred thirty-eight thousand, four hundred eighteen".