51294893 has 4 divisors (see below), whose sum is σ = 55240668. Its totient is φ = 47349120.

The previous prime is 51294871. The next prime is 51294911. The reversal of 51294893 is 39849215.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3988009 + 47306884 = 1997^2 + 6878^2 .

It is not a de Polignac number, because 51294893 - 2¹⁶ = 51229357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51294893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51294833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1972868 + ... + 1972893.

It is an arithmetic number, because the mean of its divisors is an integer number (13810167).

Almost surely, 2^51294893 is an apocalyptic number.

It is an amenable number.

51294893 is a deficient number, since it is larger than the sum of its proper divisors (3945775).

51294893 is a wasteful number, since it uses less digits than its factorization.

51294893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3945774.

The product of its digits is 77760, while the sum is 41.

The square root of 51294893 is about 7162.0453084297. The cubic root of 51294893 is about 371.5563683867.

The spelling of 51294893 in words is "fifty-one million, two hundred ninety-four thousand, eight hundred ninety-three".