51521849 has 8 divisors (see below), whose sum is σ = 54639360. Its totient is φ = 48414016.

The previous prime is 51521843. The next prime is 51521851. The reversal of 51521849 is 94812515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51521849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51521843) 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 7 ways as a sum of consecutive naturals, for example, 10592 + ... + 14670.

It is an arithmetic number, because the mean of its divisors is an integer number (6829920).

Almost surely, 2^51521849 is an apocalyptic number.

It is an amenable number.

51521849 is a deficient number, since it is larger than the sum of its proper divisors (3117511).

51521849 is a wasteful number, since it uses less digits than its factorization.

51521849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4839.

The product of its digits is 14400, while the sum is 35.

The square root of 51521849 is about 7177.8721777418. The cubic root of 51521849 is about 372.1035501032.

The spelling of 51521849 in words is "fifty-one million, five hundred twenty-one thousand, eight hundred forty-nine".