51225641 has 8 divisors (see below), whose sum is σ = 54849960. Its totient is φ = 47669248.

The previous prime is 51225637. The next prime is 51225659. The reversal of 51225641 is 14652215.

It can be written as a sum of positive squares in 4 ways, for example, as 24403600 + 26822041 = 4940^2 + 5179^2 .

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 51225641 - 2² = 51225637 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 51225641.

It is not an unprimeable number, because it can be changed into a prime (51225611) 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 7 ways as a sum of consecutive naturals, for example, 15416 + ... + 18441.

It is an arithmetic number, because the mean of its divisors is an integer number (6856245).

Almost surely, 2^51225641 is an apocalyptic number.

It is an amenable number.

51225641 is a deficient number, since it is larger than the sum of its proper divisors (3624319).

51225641 is a wasteful number, since it uses less digits than its factorization.

51225641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33963.

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

The square root of 51225641 is about 7157.2090230760. The cubic root of 51225641 is about 371.3890833126.

Adding to 51225641 its reverse (14652215), we get a palindrome (65877856).

The spelling of 51225641 in words is "fifty-one million, two hundred twenty-five thousand, six hundred forty-one".