51151117 has 2 divisors, whose sum is σ = 51151118. Its totient is φ = 51151116.

The previous prime is 51151109. The next prime is 51151127. The reversal of 51151117 is 71115115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50324836 + 826281 = 7094^2 + 909^2 .

It is a cyclic number.

It is not a de Polignac number, because 51151117 - 2³ = 51151109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51151127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25575558 + 25575559.

It is an arithmetic number, because the mean of its divisors is an integer number (25575559).

Almost surely, 2^51151117 is an apocalyptic number.

It is an amenable number.

51151117 is a deficient number, since it is larger than the sum of its proper divisors (1).

51151117 is an equidigital number, since it uses as much as digits as its factorization.

51151117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 175, while the sum is 22.

The square root of 51151117 is about 7152.0009088366. Note that the first 3 decimals coincide. The cubic root of 51151117 is about 371.2088946920.

The spelling of 51151117 in words is "fifty-one million, one hundred fifty-one thousand, one hundred seventeen".