51357305 has 4 divisors (see below), whose sum is σ = 61628772. Its totient is φ = 41085840.

The previous prime is 51357301. The next prime is 51357307. The reversal of 51357305 is 50375315.

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 29333056 + 22024249 = 5416^2 + 4693^2 .

It is not a de Polignac number, because 51357305 - 2² = 51357301 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51357301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5135726 + ... + 5135735.

It is an arithmetic number, because the mean of its divisors is an integer number (15407193).

Almost surely, 2^51357305 is an apocalyptic number.

It is an amenable number.

51357305 is a deficient number, since it is larger than the sum of its proper divisors (10271467).

51357305 is a wasteful number, since it uses less digits than its factorization.

51357305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10271466.

The product of its (nonzero) digits is 7875, while the sum is 29.

The square root of 51357305 is about 7166.4011191113. The cubic root of 51357305 is about 371.7070018183.

The spelling of 51357305 in words is "fifty-one million, three hundred fifty-seven thousand, three hundred five".