51402424 has 32 divisors (see below), whose sum is σ = 106492320. Its totient is φ = 23136256.

The previous prime is 51402409. The next prime is 51402437. The reversal of 51402424 is 42420415.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 51402395 and 51402404.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 5089 + ... + 11344.

It is an arithmetic number, because the mean of its divisors is an integer number (3327885).

Almost surely, 2^51402424 is an apocalyptic number.

It is an amenable number.

51402424 is an abundant number, since it is smaller than the sum of its proper divisors (55089896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51402424 is a wasteful number, since it uses less digits than its factorization.

51402424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16479 (or 16475 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 51402424 is about 7169.5483818718. The cubic root of 51402424 is about 371.8158220359.

Adding to 51402424 its reverse (42420415), we get a palindrome (93822839).

Subtracting from 51402424 its reverse (42420415), we obtain a square (8982009 = 2997²).

The spelling of 51402424 in words is "fifty-one million, four hundred two thousand, four hundred twenty-four".