51065552 has 40 divisors (see below), whose sum is σ = 105401736. Its totient is φ = 23883776.

The previous prime is 51065533. The next prime is 51065579. The reversal of 51065552 is 25556015.

It can be written as a sum of positive squares in 4 ways, for example, as 27290176 + 23775376 = 5224^2 + 4876^2 .

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 53108 + ... + 54060.

Almost surely, 2^51065552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51065552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52700868).

51065552 is an abundant number, since it is smaller than the sum of its proper divisors (54336184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51065552 is a wasteful number, since it uses less digits than its factorization.

51065552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175 (or 1169 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 51065552 is about 7146.0165127153. The cubic root of 51065552 is about 371.0017945148.

The spelling of 51065552 in words is "fifty-one million, sixty-five thousand, five hundred fifty-two".