51676521 has 16 divisors (see below), whose sum is σ = 76762560. Its totient is φ = 30703680.

The previous prime is 51676517. The next prime is 51676543. The reversal of 51676521 is 12567615.

It is not a de Polignac number, because 51676521 - 2² = 51676517 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51676511) 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 15 ways as a sum of consecutive naturals, for example, 21715 + ... + 23976.

It is an arithmetic number, because the mean of its divisors is an integer number (4797660).

Almost surely, 2^51676521 is an apocalyptic number.

It is an amenable number.

51676521 is a deficient number, since it is larger than the sum of its proper divisors (25086039).

51676521 is a wasteful number, since it uses less digits than its factorization.

51676521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45736.

The product of its digits is 12600, while the sum is 33.

The square root of 51676521 is about 7188.6383272495. The cubic root of 51676521 is about 372.4755379339.

The spelling of 51676521 in words is "fifty-one million, six hundred seventy-six thousand, five hundred twenty-one".