51242663 has 2 divisors, whose sum is σ = 51242664. Its totient is φ = 51242662.

The previous prime is 51242651. The next prime is 51242671. The reversal of 51242663 is 36624215.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51242663 - 2¹⁸ = 50980519 is a prime.

It is a super-2 number, since 2×51242663² = 5251621022663138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51242683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25621331 + 25621332.

It is an arithmetic number, because the mean of its divisors is an integer number (25621332).

Almost surely, 2^51242663 is an apocalyptic number.

51242663 is a deficient number, since it is larger than the sum of its proper divisors (1).

51242663 is an equidigital number, since it uses as much as digits as its factorization.

51242663 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 51242663 is about 7158.3980749886. The cubic root of 51242663 is about 371.4302156098.

Adding to 51242663 its reverse (36624215), we get a palindrome (87866878).

The spelling of 51242663 in words is "fifty-one million, two hundred forty-two thousand, six hundred sixty-three".