51542245 has 4 divisors (see below), whose sum is σ = 61850700. Its totient is φ = 41233792.

The previous prime is 51542203. The next prime is 51542261. The reversal of 51542245 is 54224515.

51542245 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.

It can be written as a sum of positive squares in 2 ways, for example, as 9771876 + 41770369 = 3126^2 + 6463^2 .

It is a cyclic number.

It is not a de Polignac number, because 51542245 - 2¹⁵ = 51509477 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 5154220 + ... + 5154229.

It is an arithmetic number, because the mean of its divisors is an integer number (15462675).

Almost surely, 2^51542245 is an apocalyptic number.

It is an amenable number.

51542245 is a deficient number, since it is larger than the sum of its proper divisors (10308455).

51542245 is a wasteful number, since it uses less digits than its factorization.

51542245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10308454.

The product of its digits is 8000, while the sum is 28.

The square root of 51542245 is about 7179.2927924692. The cubic root of 51542245 is about 372.1526452793.

The spelling of 51542245 in words is "fifty-one million, five hundred forty-two thousand, two hundred forty-five".