51357205 has 4 divisors (see below), whose sum is σ = 61628652. Its totient is φ = 41085760.

The previous prime is 51357197. The next prime is 51357223. The reversal of 51357205 is 50275315.

51357205 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 20421361 + 30935844 = 4519^2 + 5562^2 .

It is not a de Polignac number, because 51357205 - 2³ = 51357197 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 5135716 + ... + 5135725.

It is an arithmetic number, because the mean of its divisors is an integer number (15407163).

Almost surely, 2^51357205 is an apocalyptic number.

It is an amenable number.

51357205 is a deficient number, since it is larger than the sum of its proper divisors (10271447).

51357205 is a wasteful number, since it uses less digits than its factorization.

51357205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10271446.

The product of its (nonzero) digits is 5250, while the sum is 28.

The square root of 51357205 is about 7166.3941421052. The cubic root of 51357205 is about 371.7067605626.

It can be divided in two parts, 5 and 1357205, that multiplied together give a square (6786025 = 2605²).

The spelling of 51357205 in words is "fifty-one million, three hundred fifty-seven thousand, two hundred five".