51087405 has 8 divisors (see below), whose sum is σ = 81739872. Its totient is φ = 27246608.

The previous prime is 51087391. The next prime is 51087427. The reversal of 51087405 is 50478015.

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

It is a cyclic number.

It is not a de Polignac number, because 51087405 - 2⁵ = 51087373 is a prime.

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, 1702899 + ... + 1702928.

It is an arithmetic number, because the mean of its divisors is an integer number (10217484).

Almost surely, 2^51087405 is an apocalyptic number.

It is an amenable number.

51087405 is a deficient number, since it is larger than the sum of its proper divisors (30652467).

51087405 is a wasteful number, since it uses less digits than its factorization.

51087405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3405835.

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 51087405 is about 7147.5453828570. The cubic root of 51087405 is about 371.0547091553.

The spelling of 51087405 in words is "fifty-one million, eighty-seven thousand, four hundred five".