51402418 has 8 divisors (see below), whose sum is σ = 77276700. Its totient is φ = 25643520.

The previous prime is 51402409. The next prime is 51402437. The reversal of 51402418 is 81420415.

It can be written as a sum of positive squares in 2 ways, for example, as 50879689 + 522729 = 7133^2 + 723^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 51402392 and 51402401.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 27723 + ... + 29518.

Almost surely, 2^51402418 is an apocalyptic number.

51402418 is a deficient number, since it is larger than the sum of its proper divisors (25874282).

51402418 is a wasteful number, since it uses less digits than its factorization.

51402418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57692.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 51402418 is about 7169.5479634354. The cubic root of 51402418 is about 371.8158075690.

The spelling of 51402418 in words is "fifty-one million, four hundred two thousand, four hundred eighteen".