51520151 has 2 divisors, whose sum is σ = 51520152. Its totient is φ = 51520150.

The previous prime is 51520129. The next prime is 51520159. The reversal of 51520151 is 15102515.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51520151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51520159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25760075 + 25760076.

It is an arithmetic number, because the mean of its divisors is an integer number (25760076).

Almost surely, 2^51520151 is an apocalyptic number.

51520151 is a deficient number, since it is larger than the sum of its proper divisors (1).

51520151 is an equidigital number, since it uses as much as digits as its factorization.

51520151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 51520151 is about 7177.7538965891. The cubic root of 51520151 is about 372.0994622661.

Adding to 51520151 its reverse (15102515), we get a palindrome (66622666).

The spelling of 51520151 in words is "fifty-one million, five hundred twenty thousand, one hundred fifty-one".