51101663 has 2 divisors, whose sum is σ = 51101664. Its totient is φ = 51101662.

The previous prime is 51101647. The next prime is 51101681. The reversal of 51101663 is 36610115.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51101663 - 2⁴ = 51101647 is a prime.

It is a super-2 number, since 2×51101663² = 5222759922731138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51101263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25550831 + 25550832.

It is an arithmetic number, because the mean of its divisors is an integer number (25550832).

Almost surely, 2^51101663 is an apocalyptic number.

51101663 is a deficient number, since it is larger than the sum of its proper divisors (1).

51101663 is an equidigital number, since it uses as much as digits as its factorization.

51101663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 51101663 is about 7148.5427186245. The cubic root of 51101663 is about 371.0892252031.

Adding to 51101663 its reverse (36610115), we get a palindrome (87711778).

The spelling of 51101663 in words is "fifty-one million, one hundred one thousand, six hundred sixty-three".