51273455 has 4 divisors (see below), whose sum is σ = 61528152. Its totient is φ = 41018760.

The previous prime is 51273413. The next prime is 51273511. The reversal of 51273455 is 55437215.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55437215 = 5 ⋅11087443.

It is not a de Polignac number, because 51273455 - 2⁸ = 51273199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5127341 + ... + 5127350.

It is an arithmetic number, because the mean of its divisors is an integer number (15382038).

Almost surely, 2^51273455 is an apocalyptic number.

51273455 is a deficient number, since it is larger than the sum of its proper divisors (10254697).

51273455 is a wasteful number, since it uses less digits than its factorization.

51273455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10254696.

The product of its digits is 21000, while the sum is 32.

The square root of 51273455 is about 7160.5485125094. The cubic root of 51273455 is about 371.5045988706.

The spelling of 51273455 in words is "fifty-one million, two hundred seventy-three thousand, four hundred fifty-five".