51440525 has 12 divisors (see below), whose sum is σ = 64079232. Its totient is φ = 40963440.

The previous prime is 51440449. The next prime is 51440531. The reversal of 51440525 is 52504415.

51440525 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 51440525 - 2¹⁴ = 51424141 is a prime.

It is a super-2 number, since 2×51440525² = 5292255224551250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51440494 and 51440503.

It is a congruent 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, 962 + ... + 10188.

It is an arithmetic number, because the mean of its divisors is an integer number (5339936).

Almost surely, 2^51440525 is an apocalyptic number.

It is an amenable number.

51440525 is a deficient number, since it is larger than the sum of its proper divisors (12638707).

51440525 is a wasteful number, since it uses less digits than its factorization.

51440525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9460 (or 9455 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 51440525 is about 7172.2050305328. The cubic root of 51440525 is about 371.9076663158.

The spelling of 51440525 in words is "fifty-one million, four hundred forty thousand, five hundred twenty-five".