51247005 has 8 divisors (see below), whose sum is σ = 81995232. Its totient is φ = 27331728.

The previous prime is 51247003. The next prime is 51247051. The reversal of 51247005 is 50074215.

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

It is not a de Polignac number, because 51247005 - 2¹ = 51247003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51247003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1708219 + ... + 1708248.

It is an arithmetic number, because the mean of its divisors is an integer number (10249404).

Almost surely, 2^51247005 is an apocalyptic number.

It is an amenable number.

51247005 is a deficient number, since it is larger than the sum of its proper divisors (30748227).

51247005 is a wasteful number, since it uses less digits than its factorization.

51247005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3416475.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 51247005 is about 7158.7013487084. The cubic root of 51247005 is about 371.4407062463.

The spelling of 51247005 in words is "fifty-one million, two hundred forty-seven thousand, five".