51457243 has 2 divisors, whose sum is σ = 51457244. Its totient is φ = 51457242.

The previous prime is 51457207. The next prime is 51457247. The reversal of 51457243 is 34275415.

51457243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51457243 - 2¹³ = 51449051 is a prime.

It is a super-2 number, since 2×51457243² = 5295695714322098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51457247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25728621 + 25728622.

It is an arithmetic number, because the mean of its divisors is an integer number (25728622).

Almost surely, 2^51457243 is an apocalyptic number.

51457243 is a deficient number, since it is larger than the sum of its proper divisors (1).

51457243 is an equidigital number, since it uses as much as digits as its factorization.

51457243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 31.

The square root of 51457243 is about 7173.3704072772. The cubic root of 51457243 is about 371.9479515379.

The spelling of 51457243 in words is "fifty-one million, four hundred fifty-seven thousand, two hundred forty-three".