51155347 has 2 divisors, whose sum is σ = 51155348. Its totient is φ = 51155346.

The previous prime is 51155311. The next prime is 51155359. The reversal of 51155347 is 74355115.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51155347 is a prime.

It is not a weakly prime, because it can be changed into another prime (51155387) 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, 25577673 + 25577674.

It is an arithmetic number, because the mean of its divisors is an integer number (25577674).

Almost surely, 2^51155347 is an apocalyptic number.

51155347 is a deficient number, since it is larger than the sum of its proper divisors (1).

51155347 is an equidigital number, since it uses as much as digits as its factorization.

51155347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10500, while the sum is 31.

The square root of 51155347 is about 7152.2966241621. The cubic root of 51155347 is about 371.2191269244.

The spelling of 51155347 in words is "fifty-one million, one hundred fifty-five thousand, three hundred forty-seven".