51825245 has 4 divisors (see below), whose sum is σ = 62190300. Its totient is φ = 41460192.

The previous prime is 51825209. The next prime is 51825247. The reversal of 51825245 is 54252815.

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 5299204 + 46526041 = 2302^2 + 6821^2 .

It is a cyclic number.

It is not a de Polignac number, because 51825245 - 2⁶ = 51825181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51825247) 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, 5182520 + ... + 5182529.

It is an arithmetic number, because the mean of its divisors is an integer number (15547575).

Almost surely, 2^51825245 is an apocalyptic number.

It is an amenable number.

51825245 is a deficient number, since it is larger than the sum of its proper divisors (10365055).

51825245 is a wasteful number, since it uses less digits than its factorization.

51825245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10365054.

The product of its digits is 16000, while the sum is 32.

The square root of 51825245 is about 7198.9752743012. The cubic root of 51825245 is about 372.8325214196.

The spelling of 51825245 in words is "fifty-one million, eight hundred twenty-five thousand, two hundred forty-five".