51465247 has 2 divisors, whose sum is σ = 51465248. Its totient is φ = 51465246.

The previous prime is 51465241. The next prime is 51465259. The reversal of 51465247 is 74256415.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51465247 - 2⁷ = 51465119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51465241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25732623 + 25732624.

It is an arithmetic number, because the mean of its divisors is an integer number (25732624).

Almost surely, 2^51465247 is an apocalyptic number.

51465247 is a deficient number, since it is larger than the sum of its proper divisors (1).

51465247 is an equidigital number, since it uses as much as digits as its factorization.

51465247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 34.

The square root of 51465247 is about 7173.9282823290. The cubic root of 51465247 is about 371.9672356197.

The spelling of 51465247 in words is "fifty-one million, four hundred sixty-five thousand, two hundred forty-seven".