51313501 has 2 divisors, whose sum is σ = 51313502. Its totient is φ = 51313500.

The previous prime is 51313481. The next prime is 51313511. The reversal of 51313501 is 10531315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48511225 + 2802276 = 6965^2 + 1674^2 .

It is a cyclic number.

It is not a de Polignac number, because 51313501 - 2⁷ = 51313373 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51313511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25656750 + 25656751.

It is an arithmetic number, because the mean of its divisors is an integer number (25656751).

Almost surely, 2^51313501 is an apocalyptic number.

It is an amenable number.

51313501 is a deficient number, since it is larger than the sum of its proper divisors (1).

51313501 is an equidigital number, since it uses as much as digits as its factorization.

51313501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225, while the sum is 19.

The square root of 51313501 is about 7163.3442608882. The cubic root of 51313501 is about 371.6012921898.

Adding to 51313501 its reverse (10531315), we get a palindrome (61844816).

The spelling of 51313501 in words is "fifty-one million, three hundred thirteen thousand, five hundred one".