51403406 has 8 divisors (see below), whose sum is σ = 77267520. Its totient is φ = 25647568.

The previous prime is 51403369. The next prime is 51403411. The reversal of 51403406 is 60430415.

It is a happy number.

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

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 3 ways as a sum of consecutive naturals, for example, 25871 + ... + 27786.

It is an arithmetic number, because the mean of its divisors is an integer number (9658440).

Almost surely, 2^51403406 is an apocalyptic number.

51403406 is a deficient number, since it is larger than the sum of its proper divisors (25864114).

51403406 is a wasteful number, since it uses less digits than its factorization.

51403406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54138.

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

The square root of 51403406 is about 7169.6168656352. The cubic root of 51403406 is about 371.8181897634.

The spelling of 51403406 in words is "fifty-one million, four hundred three thousand, four hundred six".