51002071 has 8 divisors (see below), whose sum is σ = 51721344. Its totient is φ = 50287200.

The previous prime is 51002051. The next prime is 51002087. The reversal of 51002071 is 17020015.

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 51002071 - 2²³ = 42613463 is a prime.

It is a super-2 number, since 2×51002071² = 5202422492578082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51002011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27066 + ... + 28888.

It is an arithmetic number, because the mean of its divisors is an integer number (6465168).

Almost surely, 2^51002071 is an apocalyptic number.

51002071 is a deficient number, since it is larger than the sum of its proper divisors (719273).

51002071 is a wasteful number, since it uses less digits than its factorization.

51002071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2201.

The product of its (nonzero) digits is 70, while the sum is 16.

The square root of 51002071 is about 7141.5734260736. The cubic root of 51002071 is about 370.8479965698.

Adding to 51002071 its reverse (17020015), we get a palindrome (68022086).

The spelling of 51002071 in words is "fifty-one million, two thousand, seventy-one".