51271513 has 2 divisors, whose sum is σ = 51271514. Its totient is φ = 51271512.

The previous prime is 51271483. The next prime is 51271543. The reversal of 51271513 is 31517215.

It is a balanced prime because it is at equal distance from previous prime (51271483) and next prime (51271543).

It can be written as a sum of positive squares in only one way, i.e., 51151104 + 120409 = 7152^2 + 347^2 .

It is a cyclic number.

It is not a de Polignac number, because 51271513 - 2¹³ = 51263321 is a prime.

It is not a weakly prime, because it can be changed into another prime (51271543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25635756 + 25635757.

It is an arithmetic number, because the mean of its divisors is an integer number (25635757).

Almost surely, 2^51271513 is an apocalyptic number.

It is an amenable number.

51271513 is a deficient number, since it is larger than the sum of its proper divisors (1).

51271513 is an equidigital number, since it uses as much as digits as its factorization.

51271513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1050, while the sum is 25.

The square root of 51271513 is about 7160.4129070885. The cubic root of 51271513 is about 371.4999085226.

Adding to 51271513 its reverse (31517215), we get a palindrome (82788728).

The spelling of 51271513 in words is "fifty-one million, two hundred seventy-one thousand, five hundred thirteen".