51601313 has 2 divisors, whose sum is σ = 51601314. Its totient is φ = 51601312.

The previous prime is 51601289. The next prime is 51601327. The reversal of 51601313 is 31310615.

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., 33085504 + 18515809 = 5752^2 + 4303^2 .

It is a cyclic number.

It is not a de Polignac number, because 51601313 - 2⁸ = 51601057 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51601343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25800656 + 25800657.

It is an arithmetic number, because the mean of its divisors is an integer number (25800657).

Almost surely, 2^51601313 is an apocalyptic number.

It is an amenable number.

51601313 is a deficient number, since it is larger than the sum of its proper divisors (1).

51601313 is an equidigital number, since it uses as much as digits as its factorization.

51601313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 51601313 is about 7183.4053902032. The cubic root of 51601313 is about 372.2947547306.

Adding to 51601313 its reverse (31310615), we get a palindrome (82911928).

The spelling of 51601313 in words is "fifty-one million, six hundred one thousand, three hundred thirteen".