51045825 has 12 divisors (see below), whose sum is σ = 84395888. Its totient is φ = 27224400.

The previous prime is 51045821. The next prime is 51045847. The reversal of 51045825 is 52854015.

It is not a de Polignac number, because 51045825 - 2² = 51045821 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51045792 and 51045801.

It is not an unprimeable number, because it can be changed into a prime (51045821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 340231 + ... + 340380.

Almost surely, 2^51045825 is an apocalyptic number.

It is an amenable number.

51045825 is a deficient number, since it is larger than the sum of its proper divisors (33350063).

51045825 is a wasteful number, since it uses less digits than its factorization.

51045825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680624 (or 680619 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The square root of 51045825 is about 7144.6360999004. The cubic root of 51045825 is about 370.9540147836.

The spelling of 51045825 in words is "fifty-one million, forty-five thousand, eight hundred twenty-five".