51561301 has 16 divisors (see below), whose sum is σ = 57268800. Its totient is φ = 46033920.

The previous prime is 51561281. The next prime is 51561311. The reversal of 51561301 is 10316515.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51561301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51561311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267061 + ... + 267253.

It is an arithmetic number, because the mean of its divisors is an integer number (3579300).

Almost surely, 2^51561301 is an apocalyptic number.

It is an amenable number.

51561301 is a deficient number, since it is larger than the sum of its proper divisors (5707499).

51561301 is a wasteful number, since it uses less digits than its factorization.

51561301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 51561301 is about 7180.6198200434. The cubic root of 51561301 is about 372.1985032418.

Adding to 51561301 its reverse (10316515), we get a palindrome (61877816).

It can be divided in two parts, 515 and 61301, that added together give a palindrome (61816).

The spelling of 51561301 in words is "fifty-one million, five hundred sixty-one thousand, three hundred one".