51383243 has 2 divisors, whose sum is σ = 51383244. Its totient is φ = 51383242.

The previous prime is 51383221. The next prime is 51383251. The reversal of 51383243 is 34238315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51383243 - 2⁶ = 51383179 is a prime.

It is a super-2 number, since 2×51383243² = 5280475322394098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51383263) 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, 25691621 + 25691622.

It is an arithmetic number, because the mean of its divisors is an integer number (25691622).

Almost surely, 2^51383243 is an apocalyptic number.

51383243 is a deficient number, since it is larger than the sum of its proper divisors (1).

51383243 is an equidigital number, since it uses as much as digits as its factorization.

51383243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 29.

The square root of 51383243 is about 7168.2105856343. The cubic root of 51383243 is about 371.7695681435.

The spelling of 51383243 in words is "fifty-one million, three hundred eighty-three thousand, two hundred forty-three".