51493045 has 4 divisors (see below), whose sum is σ = 61791660. Its totient is φ = 41194432.

The previous prime is 51493037. The next prime is 51493049. The reversal of 51493045 is 54039415.

51493045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54039415 = 5 ⋅10807883.

It can be written as a sum of positive squares in 2 ways, for example, as 13965169 + 37527876 = 3737^2 + 6126^2 .

It is a cyclic number.

It is not a de Polignac number, because 51493045 - 2³ = 51493037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51492998 and 51493016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51493049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5149300 + ... + 5149309.

It is an arithmetic number, because the mean of its divisors is an integer number (15447915).

Almost surely, 2^51493045 is an apocalyptic number.

It is an amenable number.

51493045 is a deficient number, since it is larger than the sum of its proper divisors (10298615).

51493045 is a wasteful number, since it uses less digits than its factorization.

51493045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10298614.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 51493045 is about 7175.8654530307. The cubic root of 51493045 is about 372.0341939702.

The spelling of 51493045 in words is "fifty-one million, four hundred ninety-three thousand, forty-five".