51199564 has 72 divisors (see below), whose sum is σ = 105144480. Its totient is φ = 21745152.

The previous prime is 51199559. The next prime is 51199567. The reversal of 51199564 is 46599115.

51199564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (51199567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 575232 + ... + 575320.

It is an arithmetic number, because the mean of its divisors is an integer number (1460340).

Almost surely, 2^51199564 is an apocalyptic number.

It is an amenable number.

51199564 is an abundant number, since it is smaller than the sum of its proper divisors (53944916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51199564 is a wasteful number, since it uses less digits than its factorization.

51199564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179 (or 164 counting only the distinct ones).

The product of its digits is 48600, while the sum is 40.

The square root of 51199564 is about 7155.3870615083. The cubic root of 51199564 is about 371.3260526586.

The spelling of 51199564 in words is "fifty-one million, one hundred ninety-nine thousand, five hundred sixty-four".