51868355 has 32 divisors (see below), whose sum is σ = 78105600. Its totient is φ = 32123520.

The previous prime is 51868351. The next prime is 51868367. The reversal of 51868355 is 55386815.

It is not a de Polignac number, because 51868355 - 2² = 51868351 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51868351) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76277 + ... + 76953.

It is an arithmetic number, because the mean of its divisors is an integer number (2440800).

Almost surely, 2^51868355 is an apocalyptic number.

51868355 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51868355 is a deficient number, since it is larger than the sum of its proper divisors (26237245).

51868355 is a wasteful number, since it uses less digits than its factorization.

51868355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899.

The product of its digits is 144000, while the sum is 41.

The square root of 51868355 is about 7201.9688280358. The cubic root of 51868355 is about 372.9358710222.

The spelling of 51868355 in words is "fifty-one million, eight hundred sixty-eight thousand, three hundred fifty-five".