51564842 has 64 divisors (see below), whose sum is σ = 100362240. Its totient is φ = 19353600.

The previous prime is 51564823. The next prime is 51564847. The reversal of 51564842 is 24846515.

It is not an unprimeable number, because it can be changed into a prime (51564847) 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 31 ways as a sum of consecutive naturals, for example, 213842 + ... + 214082.

It is an arithmetic number, because the mean of its divisors is an integer number (1568160).

Almost surely, 2^51564842 is an apocalyptic number.

51564842 is a deficient number, since it is larger than the sum of its proper divisors (48797398).

51564842 is a wasteful number, since it uses less digits than its factorization.

51564842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327.

The product of its digits is 38400, while the sum is 35.

The square root of 51564842 is about 7180.8663822689. The cubic root of 51564842 is about 372.2070233574.

The spelling of 51564842 in words is "fifty-one million, five hundred sixty-four thousand, eight hundred forty-two".