51851768 has 32 divisors (see below), whose sum is σ = 106498800. Its totient is φ = 23557632.

The previous prime is 51851753. The next prime is 51851801. The reversal of 51851768 is 86715815.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent 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, 2630 + ... + 10517.

Almost surely, 2^51851768 is an apocalyptic number.

51851768 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

51851768 is an abundant number, since it is smaller than the sum of its proper divisors (54647032).

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

51851768 is a wasteful number, since it uses less digits than its factorization.

51851768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13199 (or 13195 counting only the distinct ones).

The product of its digits is 67200, while the sum is 41.

The square root of 51851768 is about 7200.8171758489. The cubic root of 51851768 is about 372.8961130182.

The spelling of 51851768 in words is "fifty-one million, eight hundred fifty-one thousand, seven hundred sixty-eight".