51220255 has 8 divisors (see below), whose sum is σ = 61567632. Its totient is φ = 40907328.

The previous prime is 51220223. The next prime is 51220291. The reversal of 51220255 is 55202215.

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

It is a cyclic number.

It is not a de Polignac number, because 51220255 - 2⁵ = 51220223 is a prime.

It is a Duffinian number.

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, 5217 + ... + 11386.

It is an arithmetic number, because the mean of its divisors is an integer number (7695954).

Almost surely, 2^51220255 is an apocalyptic number.

51220255 is a deficient number, since it is larger than the sum of its proper divisors (10347377).

51220255 is a wasteful number, since it uses less digits than its factorization.

51220255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17225.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 51220255 is about 7156.8327491985. The cubic root of 51220255 is about 371.3760665780.

The spelling of 51220255 in words is "fifty-one million, two hundred twenty thousand, two hundred fifty-five".