51942247 has 8 divisors (see below), whose sum is σ = 59503136. Its totient is φ = 44416512.

The previous prime is 51942229. The next prime is 51942271. The reversal of 51942247 is 74224915.

51942247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-51942247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51942217) 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 7 ways as a sum of consecutive naturals, for example, 5538 + ... + 11599.

It is an arithmetic number, because the mean of its divisors is an integer number (7437892).

Almost surely, 2^51942247 is an apocalyptic number.

51942247 is a deficient number, since it is larger than the sum of its proper divisors (7560889).

51942247 is a wasteful number, since it uses less digits than its factorization.

51942247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17577.

The product of its digits is 20160, while the sum is 34.

The square root of 51942247 is about 7207.0969883858. The cubic root of 51942247 is about 373.1128826238.

The spelling of 51942247 in words is "fifty-one million, nine hundred forty-two thousand, two hundred forty-seven".