51573545 has 4 divisors (see below), whose sum is σ = 61888260. Its totient is φ = 41258832.

The previous prime is 51573541. The next prime is 51573547. The reversal of 51573545 is 54537515.

51573545 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: 54537515 = 5 ⋅10907503.

It can be written as a sum of positive squares in 2 ways, for example, as 39904489 + 11669056 = 6317^2 + 3416^2 .

It is a cyclic number.

It is not a de Polignac number, because 51573545 - 2² = 51573541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51573541) 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, 5157350 + ... + 5157359.

It is an arithmetic number, because the mean of its divisors is an integer number (15472065).

Almost surely, 2^51573545 is an apocalyptic number.

It is an amenable number.

51573545 is a deficient number, since it is larger than the sum of its proper divisors (10314715).

51573545 is a wasteful number, since it uses less digits than its factorization.

51573545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10314714.

The product of its digits is 52500, while the sum is 35.

The square root of 51573545 is about 7181.4723420758. The cubic root of 51573545 is about 372.2279622721.

The spelling of 51573545 in words is "fifty-one million, five hundred seventy-three thousand, five hundred forty-five".