51311011 has 2 divisors, whose sum is σ = 51311012. Its totient is φ = 51311010.

The previous prime is 51311003. The next prime is 51311017. The reversal of 51311011 is 11011315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51311011 - 2³ = 51311003 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51310982 and 51311000.

It is not a weakly prime, because it can be changed into another prime (51311017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25655505 + 25655506.

It is an arithmetic number, because the mean of its divisors is an integer number (25655506).

Almost surely, 2^51311011 is an apocalyptic number.

51311011 is a deficient number, since it is larger than the sum of its proper divisors (1).

51311011 is an equidigital number, since it uses as much as digits as its factorization.

51311011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15, while the sum is 13.

The square root of 51311011 is about 7163.1704572766. The cubic root of 51311011 is about 371.5952814118.

Adding to 51311011 its reverse (11011315), we get a palindrome (62322326).

The spelling of 51311011 in words is "fifty-one million, three hundred eleven thousand, eleven".