51948918 has 96 divisors (see below), whose sum is σ = 139125600. Its totient is φ = 14309568.

The previous prime is 51948863. The next prime is 51948931. The reversal of 51948918 is 81984915.

51948918 is a `hidden beast` number, since 519 + 48 + 91 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 76396 + ... + 77072.

It is an arithmetic number, because the mean of its divisors is an integer number (1449225).

Almost surely, 2^51948918 is an apocalyptic number.

51948918 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51948918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69562800).

51948918 is an abundant number, since it is smaller than the sum of its proper divisors (87176682).

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

51948918 is a wasteful number, since it uses less digits than its factorization.

51948918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731 (or 718 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 51948918 is about 7207.5597812297. The cubic root of 51948918 is about 373.1288550396.

The spelling of 51948918 in words is "fifty-one million, nine hundred forty-eight thousand, nine hundred eighteen".