51425261 has 8 divisors (see below), whose sum is σ = 52186464. Its totient is φ = 50669200.

The previous prime is 51425243. The next prime is 51425273. The reversal of 51425261 is 16252415.

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 51425261 - 2¹⁸ = 51163117 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 51425261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51425161) 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, 21806 + ... + 24048.

It is an arithmetic number, because the mean of its divisors is an integer number (6523308).

Almost surely, 2^51425261 is an apocalyptic number.

It is an amenable number.

51425261 is a deficient number, since it is larger than the sum of its proper divisors (761203).

51425261 is a wasteful number, since it uses less digits than its factorization.

51425261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2571.

The product of its digits is 2400, while the sum is 26.

The square root of 51425261 is about 7171.1408436873. The cubic root of 51425261 is about 371.8708771616.

Adding to 51425261 its reverse (16252415), we get a palindrome (67677676).

The spelling of 51425261 in words is "fifty-one million, four hundred twenty-five thousand, two hundred sixty-one".