51455 has 8 divisors (see below), whose sum is σ = 63504. Its totient is φ = 40000.

The previous prime is 51449. The next prime is 51461. The reversal of 51455 is 55415.

51455 = 26² + 27² + ... + 55².

It is an interprime number because it is at equal distance from previous prime (51449) and next prime (51461).

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

It is not a de Polignac number, because 51455 - 2⁴ = 51439 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 51455.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80 + ... + 330.

It is an arithmetic number, because the mean of its divisors is an integer number (7938).

2⁵¹⁴⁵⁵ is an apocalyptic number.

51455 is a deficient number, since it is larger than the sum of its proper divisors (12049).

51455 is a wasteful number, since it uses less digits than its factorization.

51455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297.

The product of its digits is 500, while the sum is 20.

The square root of 51455 is about 226.8369458444. The cubic root of 51455 is about 37.1942547107.

The spelling of 51455 in words is "fifty-one thousand, four hundred fifty-five".