51353405 has 4 divisors (see below), whose sum is σ = 61624092. Its totient is φ = 41082720.

The previous prime is 51353389. The next prime is 51353417. The reversal of 51353405 is 50435315.

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 18783556 + 32569849 = 4334^2 + 5707^2 .

It is not a de Polignac number, because 51353405 - 2⁴ = 51353389 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, 5135336 + ... + 5135345.

It is an arithmetic number, because the mean of its divisors is an integer number (15406023).

Almost surely, 2^51353405 is an apocalyptic number.

It is an amenable number.

51353405 is a deficient number, since it is larger than the sum of its proper divisors (10270687).

51353405 is a wasteful number, since it uses less digits than its factorization.

51353405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10270686.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 51353405 is about 7166.1290108398. The cubic root of 51353405 is about 371.6975926148.

The spelling of 51353405 in words is "fifty-one million, three hundred fifty-three thousand, four hundred five".