51405463 has 2 divisors, whose sum is σ = 51405464. Its totient is φ = 51405462.

The previous prime is 51405413. The next prime is 51405479. The reversal of 51405463 is 36450415.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51405463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51405413) 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, 25702731 + 25702732.

It is an arithmetic number, because the mean of its divisors is an integer number (25702732).

Almost surely, 2^51405463 is an apocalyptic number.

51405463 is a deficient number, since it is larger than the sum of its proper divisors (1).

51405463 is an equidigital number, since it uses as much as digits as its factorization.

51405463 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 51405463 is about 7169.7603167749. The cubic root of 51405463 is about 371.8231493558.

Adding to 51405463 its reverse (36450415), we get a palindrome (87855878).

The spelling of 51405463 in words is "fifty-one million, four hundred five thousand, four hundred sixty-three".