51273893 has 4 divisors (see below), whose sum is σ = 55935168. Its totient is φ = 46612620.

The previous prime is 51273889. The next prime is 51273899. The reversal of 51273893 is 39837215.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51273893 - 2² = 51273889 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51273899) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2330621 + ... + 2330642.

It is an arithmetic number, because the mean of its divisors is an integer number (13983792).

Almost surely, 2^51273893 is an apocalyptic number.

It is an amenable number.

51273893 is a deficient number, since it is larger than the sum of its proper divisors (4661275).

51273893 is a wasteful number, since it uses less digits than its factorization.

51273893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4661274.

The product of its digits is 45360, while the sum is 38.

The square root of 51273893 is about 7160.5790966932. The cubic root of 51273893 is about 371.5056567185.

The spelling of 51273893 in words is "fifty-one million, two hundred seventy-three thousand, eight hundred ninety-three".