51262561 has 16 divisors (see below), whose sum is σ = 63111168. Its totient is φ = 40669200.

The previous prime is 51262559. The next prime is 51262573. The reversal of 51262561 is 16526215.

It is a cyclic number.

It is not a de Polignac number, because 51262561 - 2¹ = 51262559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51262511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145 + ... + 10126.

It is an arithmetic number, because the mean of its divisors is an integer number (3944448).

Almost surely, 2^51262561 is an apocalyptic number.

It is an amenable number.

51262561 is a deficient number, since it is larger than the sum of its proper divisors (11848607).

51262561 is a wasteful number, since it uses less digits than its factorization.

51262561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10332.

The product of its digits is 3600, while the sum is 28.

The square root of 51262561 is about 7159.7877761844. The cubic root of 51262561 is about 371.4782859843.

Adding to 51262561 its reverse (16526215), we get a palindrome (67788776).

The spelling of 51262561 in words is "fifty-one million, two hundred sixty-two thousand, five hundred sixty-one".