51384025 has 24 divisors (see below), whose sum is σ = 79441344. Its totient is φ = 32030400.

The previous prime is 51384023. The next prime is 51384031. The reversal of 51384025 is 52048315.

It is not a de Polignac number, because 51384025 - 2¹ = 51384023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51383984 and 51384002.

It is not an unprimeable number, because it can be changed into a prime (51384023) 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 23 ways as a sum of consecutive naturals, for example, 11422 + ... + 15271.

It is an arithmetic number, because the mean of its divisors is an integer number (3310056).

Almost surely, 2^51384025 is an apocalyptic number.

51384025 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51384025 is a deficient number, since it is larger than the sum of its proper divisors (28057319).

51384025 is a wasteful number, since it uses less digits than its factorization.

51384025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26721 (or 26716 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 51384025 is about 7168.2651318154. The cubic root of 51384025 is about 371.7714541172.

The spelling of 51384025 in words is "fifty-one million, three hundred eighty-four thousand, twenty-five".