51810855 has 16 divisors (see below), whose sum is σ = 83174784. Its totient is φ = 27540000.

The previous prime is 51810833. The next prime is 51810859. The reversal of 51810855 is 55801815.

It is not a de Polignac number, because 51810855 - 2⁵ = 51810823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51810859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1021 + ... + 10230.

It is an arithmetic number, because the mean of its divisors is an integer number (5198424).

Almost surely, 2^51810855 is an apocalyptic number.

51810855 is a deficient number, since it is larger than the sum of its proper divisors (31363929).

51810855 is a wasteful number, since it uses less digits than its factorization.

51810855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11566.

The product of its (nonzero) digits is 8000, while the sum is 33.

The square root of 51810855 is about 7197.9757571139. The cubic root of 51810855 is about 372.7980108472.

The spelling of 51810855 in words is "fifty-one million, eight hundred ten thousand, eight hundred fifty-five".