51402663 has 12 divisors (see below), whose sum is σ = 79959880. Its totient is φ = 31632336.

The previous prime is 51402641. The next prime is 51402667. The reversal of 51402663 is 36620415.

51402663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51402663 - 2¹⁰ = 51401639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51402667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 219553 + ... + 219786.

Almost surely, 2^51402663 is an apocalyptic number.

51402663 is a deficient number, since it is larger than the sum of its proper divisors (28557217).

51402663 is a wasteful number, since it uses less digits than its factorization.

51402663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439358 (or 439355 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 51402663 is about 7169.5650495689. The cubic root of 51402663 is about 371.8163982982.

It can be divided in two parts, 514026 and 63, that added together give a square (514089 = 717²).

The spelling of 51402663 in words is "fifty-one million, four hundred two thousand, six hundred sixty-three".