51517001 has 8 divisors (see below), whose sum is σ = 52494408. Its totient is φ = 50544000.

The previous prime is 51516989. The next prime is 51517013. The reversal of 51517001 is 10071515.

51517001 = T₁₅₈ + T₁₅₉ + ... + T₆₇₈.

It is an interprime number because it is at equal distance from previous prime (51516989) and next prime (51517013).

It can be written as a sum of positive squares in 4 ways, for example, as 765625 + 50751376 = 875^2 + 7124^2 .

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 51517001 - 2¹⁸ = 51254857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51517031) 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, 30971 + ... + 32591.

It is an arithmetic number, because the mean of its divisors is an integer number (6561801).

Almost surely, 2^51517001 is an apocalyptic number.

It is an amenable number.

51517001 is a deficient number, since it is larger than the sum of its proper divisors (977407).

51517001 is a wasteful number, since it uses less digits than its factorization.

51517001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2203.

The product of its (nonzero) digits is 175, while the sum is 20.

The square root of 51517001 is about 7177.5344652603. The cubic root of 51517001 is about 372.0918785850.

Adding to 51517001 its reverse (10071515), we get a palindrome (61588516).

The spelling of 51517001 in words is "fifty-one million, five hundred seventeen thousand, one".