51293405 has 4 divisors (see below), whose sum is σ = 61552092. Its totient is φ = 41034720.

The previous prime is 51293393. The next prime is 51293413. The reversal of 51293405 is 50439215.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20313049 + 30980356 = 4507^2 + 5566^2 .

It is not a de Polignac number, because 51293405 - 2⁸ = 51293149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5129336 + ... + 5129345.

It is an arithmetic number, because the mean of its divisors is an integer number (15388023).

Almost surely, 2^51293405 is an apocalyptic number.

It is an amenable number.

51293405 is a deficient number, since it is larger than the sum of its proper divisors (10258687).

51293405 is a wasteful number, since it uses less digits than its factorization.

51293405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10258686.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 51293405 is about 7161.9414267362. The cubic root of 51293405 is about 371.5527755584.

The spelling of 51293405 in words is "fifty-one million, two hundred ninety-three thousand, four hundred five".