51478625 has 32 divisors (see below), whose sum is σ = 72558720. Its totient is φ = 36120000.

The previous prime is 51478613. The next prime is 51478643. The reversal of 51478625 is 52687415.

It is not a de Polignac number, because 51478625 - 2⁸ = 51478369 is a prime.

It is a nialpdrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39230 + ... + 40520.

It is an arithmetic number, because the mean of its divisors is an integer number (2267460).

Almost surely, 2^51478625 is an apocalyptic number.

51478625 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51478625 is a deficient number, since it is larger than the sum of its proper divisors (21080095).

51478625 is a wasteful number, since it uses less digits than its factorization.

51478625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346 (or 1336 counting only the distinct ones).

The product of its digits is 67200, while the sum is 38.

The square root of 51478625 is about 7174.8606258240. The cubic root of 51478625 is about 371.9994628466. Note that the first 3 decimals are identical.

The spelling of 51478625 in words is "fifty-one million, four hundred seventy-eight thousand, six hundred twenty-five".