51813878 has 8 divisors (see below), whose sum is σ = 77881872. Its totient is φ = 25853256.

The previous prime is 51813863. The next prime is 51813887. The reversal of 51813878 is 87831815.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25625 + ... + 27572.

It is an arithmetic number, because the mean of its divisors is an integer number (9735234).

Almost surely, 2^51813878 is an apocalyptic number.

51813878 is a deficient number, since it is larger than the sum of its proper divisors (26067994).

51813878 is a wasteful number, since it uses less digits than its factorization.

51813878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53686.

The product of its digits is 53760, while the sum is 41.

The square root of 51813878 is about 7198.1857436440. The cubic root of 51813878 is about 372.8052612356.

The spelling of 51813878 in words is "fifty-one million, eight hundred thirteen thousand, eight hundred seventy-eight".