51117463 has 2 divisors, whose sum is σ = 51117464. Its totient is φ = 51117462.

The previous prime is 51117439. The next prime is 51117491. The reversal of 51117463 is 36471115.

It is an a-pointer prime, because the next prime (51117491) can be obtained adding 51117463 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51117463 - 2²¹ = 49020311 is a prime.

It is a super-2 number, since 2×51117463² = 5225990047112738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51117763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25558731 + 25558732.

It is an arithmetic number, because the mean of its divisors is an integer number (25558732).

Almost surely, 2^51117463 is an apocalyptic number.

51117463 is a deficient number, since it is larger than the sum of its proper divisors (1).

51117463 is an equidigital number, since it uses as much as digits as its factorization.

51117463 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 28.

The square root of 51117463 is about 7149.6477535610. The cubic root of 51117463 is about 371.1274666565.

Adding to 51117463 its reverse (36471115), we get a palindrome (87588578).

The spelling of 51117463 in words is "fifty-one million, one hundred seventeen thousand, four hundred sixty-three".