51692405 has 4 divisors (see below), whose sum is σ = 62030892. Its totient is φ = 41353920.

The previous prime is 51692401. The next prime is 51692419. The reversal of 51692405 is 50429615.

51692405 = 4150² + 4151² + 4152².

It is a happy number.

51692405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 23059204 + 28633201 = 4802^2 + 5351^2 .

It is not a de Polignac number, because 51692405 - 2² = 51692401 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51692401) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5169236 + ... + 5169245.

It is an arithmetic number, because the mean of its divisors is an integer number (15507723).

Almost surely, 2^51692405 is an apocalyptic number.

It is an amenable number.

51692405 is a deficient number, since it is larger than the sum of its proper divisors (10338487).

51692405 is a wasteful number, since it uses less digits than its factorization.

51692405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10338486.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 51692405 is about 7189.7430413054. The cubic root of 51692405 is about 372.5136970775.

The spelling of 51692405 in words is "fifty-one million, six hundred ninety-two thousand, four hundred five".