199780052 has 6 divisors (see below), whose sum is σ = 349615098. Its totient is φ = 99890024.

The previous prime is 199780051. The next prime is 199780099. The reversal of 199780052 is 250087991.

It can be written as a sum of positive squares in only one way, i.e., 175138756 + 24641296 = 13234^2 + 4964^2 .

It is a junction number, because it is equal to n+sod(n) for n = 199779991 and 199780009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199780051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24972503 + ... + 24972510.

It is an arithmetic number, because the mean of its divisors is an integer number (58269183).

Almost surely, 2^199780052 is an apocalyptic number.

It is an amenable number.

199780052 is a deficient number, since it is larger than the sum of its proper divisors (149835046).

199780052 is a wasteful number, since it uses less digits than its factorization.

199780052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49945017 (or 49945015 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 199780052 is about 14134.3571484521. The cubic root of 199780052 is about 584.5890917236.

The spelling of 199780052 in words is "one hundred ninety-nine million, seven hundred eighty thousand, fifty-two".