51200561 has 8 divisors (see below), whose sum is σ = 53163264. Its totient is φ = 49257360.

The previous prime is 51200557. The next prime is 51200581. The reversal of 51200561 is 16500215.

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 51200561 - 2² = 51200557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51200581) 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, 590 + ... + 10136.

It is an arithmetic number, because the mean of its divisors is an integer number (6645408).

Almost surely, 2^51200561 is an apocalyptic number.

It is an amenable number.

51200561 is a deficient number, since it is larger than the sum of its proper divisors (1962703).

51200561 is a wasteful number, since it uses less digits than its factorization.

51200561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9751.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 51200561 is about 7155.4567289587. The cubic root of 51200561 is about 371.3284628983.

Adding to 51200561 its reverse (16500215), we get a palindrome (67700776).

The spelling of 51200561 in words is "fifty-one million, two hundred thousand, five hundred sixty-one".