51564650 has 24 divisors (see below), whose sum is σ = 96124800. Its totient is φ = 20579760.

The previous prime is 51564647. The next prime is 51564659. The reversal of 51564650 is 5646515.

It is not an unprimeable number, because it can be changed into a prime (51564659) 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 11 ways as a sum of consecutive naturals, for example, 29501 + ... + 31199.

It is an arithmetic number, because the mean of its divisors is an integer number (4005200).

Almost surely, 2^51564650 is an apocalyptic number.

51564650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51564650 is a deficient number, since it is larger than the sum of its proper divisors (44560150).

51564650 is a wasteful number, since it uses less digits than its factorization.

51564650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2318 (or 2313 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 51564650 is about 7180.8530133961. The cubic root of 51564650 is about 372.2065613899.

The spelling of 51564650 in words is "fifty-one million, five hundred sixty-four thousand, six hundred fifty".