51604025 has 12 divisors (see below), whose sum is σ = 69806544. Its totient is φ = 37530000.

The previous prime is 51604009. The next prime is 51604043. The reversal of 51604025 is 52040615.

51604025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51604025 - 2⁴ = 51604009 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93551 + ... + 94100.

It is an arithmetic number, because the mean of its divisors is an integer number (5817212).

Almost surely, 2^51604025 is an apocalyptic number.

51604025 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51604025 is a deficient number, since it is larger than the sum of its proper divisors (18202519).

51604025 is a wasteful number, since it uses less digits than its factorization.

51604025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187672 (or 187667 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 51604025 is about 7183.5941561310. The cubic root of 51604025 is about 372.3012768236.

The spelling of 51604025 in words is "fifty-one million, six hundred four thousand, twenty-five".