51002247 has 8 divisors (see below), whose sum is σ = 70959744. Its totient is φ = 32523128.

The previous prime is 51002239. The next prime is 51002249. The reversal of 51002247 is 74220015.

51002247 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 cyclic number.

It is not a de Polignac number, because 51002247 - 2³ = 51002239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51002249) 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, 369513 + ... + 369650.

It is an arithmetic number, because the mean of its divisors is an integer number (8869968).

Almost surely, 2^51002247 is an apocalyptic number.

51002247 is a deficient number, since it is larger than the sum of its proper divisors (19957497).

51002247 is a wasteful number, since it uses less digits than its factorization.

51002247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739189.

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 51002247 is about 7141.5857482775. The cubic root of 51002247 is about 370.8484231484.

The spelling of 51002247 in words is "fifty-one million, two thousand, two hundred forty-seven".