51994825 has 18 divisors (see below), whose sum is σ = 66800474. Its totient is φ = 40145280.

The previous prime is 51994799. The next prime is 51994829. The reversal of 51994825 is 52849915.

It can be written as a sum of positive squares in 9 ways, for example, as 7225344 + 44769481 = 2688^2 + 6691^2 .

It is not a de Polignac number, because 51994825 - 2⁵ = 51994793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51994829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 19789 + ... + 22261.

Almost surely, 2^51994825 is an apocalyptic number.

It is an amenable number.

51994825 is a deficient number, since it is larger than the sum of its proper divisors (14805649).

51994825 is a wasteful number, since it uses less digits than its factorization.

51994825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2541 (or 2507 counting only the distinct ones).

The product of its digits is 129600, while the sum is 43.

The square root of 51994825 is about 7210.7437203107. The cubic root of 51994825 is about 373.2387333830.

The spelling of 51994825 in words is "fifty-one million, nine hundred ninety-four thousand, eight hundred twenty-five".