51641874 has 48 divisors (see below), whose sum is σ = 118067040. Its totient is φ = 16912800.

The previous prime is 51641851. The next prime is 51641881. The reversal of 51641874 is 47814615.

It is a happy number.

51641874 is a `hidden beast` number, since 5 + 1 + 641 + 8 + 7 + 4 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27774 + ... + 29574.

It is an arithmetic number, because the mean of its divisors is an integer number (2459730).

Almost surely, 2^51641874 is an apocalyptic number.

51641874 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51641874, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59033520).

51641874 is an abundant number, since it is smaller than the sum of its proper divisors (66425166).

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

51641874 is a wasteful number, since it uses less digits than its factorization.

51641874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1877 (or 1865 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 51641874 is about 7186.2280787629. The cubic root of 51641874 is about 372.3922761036.

The spelling of 51641874 in words is "fifty-one million, six hundred forty-one thousand, eight hundred seventy-four".