51257347 has 2 divisors, whose sum is σ = 51257348. Its totient is φ = 51257346.

The previous prime is 51257293. The next prime is 51257351. The reversal of 51257347 is 74375215.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51257347 - 2¹¹ = 51255299 is a prime.

It is not a weakly prime, because it can be changed into another prime (51257377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25628673 + 25628674.

It is an arithmetic number, because the mean of its divisors is an integer number (25628674).

Almost surely, 2^51257347 is an apocalyptic number.

51257347 is a deficient number, since it is larger than the sum of its proper divisors (1).

51257347 is an equidigital number, since it uses as much as digits as its factorization.

51257347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29400, while the sum is 34.

The square root of 51257347 is about 7159.4236499875. The cubic root of 51257347 is about 371.4656910000.

The spelling of 51257347 in words is "fifty-one million, two hundred fifty-seven thousand, three hundred forty-seven".