51512201 has 8 divisors (see below), whose sum is σ = 55985160. Its totient is φ = 47112192.

The previous prime is 51512189. The next prime is 51512233. The reversal of 51512201 is 10221515.

It can be written as a sum of positive squares in 4 ways, for example, as 1795600 + 49716601 = 1340^2 + 7051^2 .

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 51512201 - 2¹⁴ = 51495817 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51512201.

It is not an unprimeable number, because it can be changed into a prime (51512281) 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, 16760 + ... + 19593.

It is an arithmetic number, because the mean of its divisors is an integer number (6998145).

Almost surely, 2^51512201 is an apocalyptic number.

It is an amenable number.

51512201 is a deficient number, since it is larger than the sum of its proper divisors (4472959).

51512201 is a wasteful number, since it uses less digits than its factorization.

51512201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36475.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 51512201 is about 7177.2000808115. The cubic root of 51512201 is about 372.0803219050.

Adding to 51512201 its reverse (10221515), we get a palindrome (61733716).

The spelling of 51512201 in words is "fifty-one million, five hundred twelve thousand, two hundred one".