51311441 has 2 divisors, whose sum is σ = 51311442. Its totient is φ = 51311440.

The previous prime is 51311401. The next prime is 51311453. The reversal of 51311441 is 14411315.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32821441 + 18490000 = 5729^2 + 4300^2 .

It is a cyclic number.

It is not a de Polignac number, because 51311441 - 2²² = 47117137 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51311401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25655720 + 25655721.

It is an arithmetic number, because the mean of its divisors is an integer number (25655721).

Almost surely, 2^51311441 is an apocalyptic number.

It is an amenable number.

51311441 is a deficient number, since it is larger than the sum of its proper divisors (1).

51311441 is an equidigital number, since it uses as much as digits as its factorization.

51311441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 240, while the sum is 20.

The square root of 51311441 is about 7163.2004718561. The cubic root of 51311441 is about 371.5963194316.

Adding to 51311441 its reverse (14411315), we get a palindrome (65722756).

The spelling of 51311441 in words is "fifty-one million, three hundred eleven thousand, four hundred forty-one".