51199566 has 32 divisors (see below), whose sum is σ = 117590400. Its totient is φ = 14698080.

The previous prime is 51199559. The next prime is 51199567. The reversal of 51199566 is 66599115.

It is a congruent number.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19161 + ... + 21668.

It is an arithmetic number, because the mean of its divisors is an integer number (3674700).

Almost surely, 2^51199566 is an apocalyptic number.

51199566 is an abundant number, since it is smaller than the sum of its proper divisors (66390834).

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

51199566 is a wasteful number, since it uses less digits than its factorization.

51199566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40864.

The product of its digits is 72900, while the sum is 42.

The square root of 51199566 is about 7155.3872012631. The cubic root of 51199566 is about 371.3260574936.

The spelling of 51199566 in words is "fifty-one million, one hundred ninety-nine thousand, five hundred sixty-six".