51400463 has 2 divisors, whose sum is σ = 51400464. Its totient is φ = 51400462.

The previous prime is 51400451. The next prime is 51400471. The reversal of 51400463 is 36400415.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51400463 - 2¹⁸ = 51138319 is a prime.

It is a super-2 number, since 2×51400463² = 5284015193228738, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51405463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25700231 + 25700232.

It is an arithmetic number, because the mean of its divisors is an integer number (25700232).

Almost surely, 2^51400463 is an apocalyptic number.

51400463 is a deficient number, since it is larger than the sum of its proper divisors (1).

51400463 is an equidigital number, since it uses as much as digits as its factorization.

51400463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 51400463 is about 7169.4116216047. The cubic root of 51400463 is about 371.8110937238.

Adding to 51400463 its reverse (36400415), we get a palindrome (87800878).

The spelling of 51400463 in words is "fifty-one million, four hundred thousand, four hundred sixty-three".