51705151 has 2 divisors, whose sum is σ = 51705152. Its totient is φ = 51705150.

The previous prime is 51705139. The next prime is 51705161. The reversal of 51705151 is 15150715.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51705151 - 2⁵ = 51705119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51705161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25852575 + 25852576.

It is an arithmetic number, because the mean of its divisors is an integer number (25852576).

Almost surely, 2^51705151 is an apocalyptic number.

51705151 is a deficient number, since it is larger than the sum of its proper divisors (1).

51705151 is an equidigital number, since it uses as much as digits as its factorization.

51705151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 875, while the sum is 25.

The square root of 51705151 is about 7190.6293883081. The cubic root of 51705151 is about 372.5443119515.

Adding to 51705151 its reverse (15150715), we get a palindrome (66855866).

The spelling of 51705151 in words is "fifty-one million, seven hundred five thousand, one hundred fifty-one".