51855201 has 32 divisors (see below), whose sum is σ = 79497600. Its totient is φ = 33384960.

The previous prime is 51855191. The next prime is 51855239. The reversal of 51855201 is 10255815.

It is not a de Polignac number, because 51855201 - 2⁶ = 51855137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (51855101) 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, 153705 + ... + 154041.

It is an arithmetic number, because the mean of its divisors is an integer number (2484300).

Almost surely, 2^51855201 is an apocalyptic number.

It is an amenable number.

51855201 is a deficient number, since it is larger than the sum of its proper divisors (27642399).

51855201 is a wasteful number, since it uses less digits than its factorization.

51855201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526 (or 520 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The square root of 51855201 is about 7201.0555476263. The cubic root of 51855201 is about 372.9043424007.

The spelling of 51855201 in words is "fifty-one million, eight hundred fifty-five thousand, two hundred one".