51200245 has 4 divisors (see below), whose sum is σ = 61440300. Its totient is φ = 40960192.

The previous prime is 51200239. The next prime is 51200263. The reversal of 51200245 is 54200215.

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 40870449 + 10329796 = 6393^2 + 3214^2 .

It is a cyclic number.

It is not a de Polignac number, because 51200245 - 2¹¹ = 51198197 is a prime.

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, 5120020 + ... + 5120029.

It is an arithmetic number, because the mean of its divisors is an integer number (15360075).

Almost surely, 2^51200245 is an apocalyptic number.

It is an amenable number.

51200245 is a deficient number, since it is larger than the sum of its proper divisors (10240055).

51200245 is a wasteful number, since it uses less digits than its factorization.

51200245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10240054.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 51200245 is about 7155.4346478743. The cubic root of 51200245 is about 371.3276989742.

The spelling of 51200245 in words is "fifty-one million, two hundred thousand, two hundred forty-five".