51445625 has 40 divisors (see below), whose sum is σ = 80224320. Its totient is φ = 32040000.

The previous prime is 51445601. The next prime is 51445633. The reversal of 51445625 is 52654415.

It is not a de Polignac number, because 51445625 - 2⁶ = 51445561 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51445591 and 51445600.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 47591 + ... + 48659.

It is an arithmetic number, because the mean of its divisors is an integer number (2005608).

Almost surely, 2^51445625 is an apocalyptic number.

51445625 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51445625 is a deficient number, since it is larger than the sum of its proper divisors (28778695).

51445625 is a wasteful number, since it uses less digits than its factorization.

51445625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107 (or 1092 counting only the distinct ones).

The product of its digits is 24000, while the sum is 32.

The square root of 51445625 is about 7172.5605609155. The cubic root of 51445625 is about 371.9199566674.

The spelling of 51445625 in words is "fifty-one million, four hundred forty-five thousand, six hundred twenty-five".