51664529 has 8 divisors (see below), whose sum is σ = 59101248. Its totient is φ = 44241840.

The previous prime is 51664523. The next prime is 51664537. The reversal of 51664529 is 92546615.

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

It is a cyclic number.

It is not a de Polignac number, because 51664529 - 2⁸ = 51664273 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51664492 and 51664501.

It is not an unprimeable number, because it can be changed into a prime (51664523) 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, 6179 + ... + 11895.

It is an arithmetic number, because the mean of its divisors is an integer number (7387656).

Almost surely, 2^51664529 is an apocalyptic number.

It is an amenable number.

51664529 is a deficient number, since it is larger than the sum of its proper divisors (7436719).

51664529 is a wasteful number, since it uses less digits than its factorization.

51664529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7015.

The product of its digits is 64800, while the sum is 38.

The square root of 51664529 is about 7187.8041848676. The cubic root of 51664529 is about 372.4467236089.

The spelling of 51664529 in words is "fifty-one million, six hundred sixty-four thousand, five hundred twenty-nine".