51010405 has 8 divisors (see below), whose sum is σ = 61253784. Its totient is φ = 40780800.

The previous prime is 51010373. The next prime is 51010411. The reversal of 51010405 is 50401015.

It is a happy number.

51010405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7963684 + 43046721 = 2822^2 + 6561^2 .

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

It is not a de Polignac number, because 51010405 - 2⁵ = 51010373 is a prime.

It is a super-2 number, since 2×51010405² = 5204122836528050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8445 + ... + 13165.

It is an arithmetic number, because the mean of its divisors is an integer number (7656723).

Almost surely, 2^51010405 is an apocalyptic number.

It is an amenable number.

51010405 is a deficient number, since it is larger than the sum of its proper divisors (10243379).

51010405 is a wasteful number, since it uses less digits than its factorization.

51010405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6887.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 51010405 is about 7142.1568871035. The cubic root of 51010405 is about 370.8681949579.

It can be divided in two parts, 51010 and 405, that added together give a palindrome (51415).

The spelling of 51010405 in words is "fifty-one million, ten thousand, four hundred five".