199822540 has 12 divisors (see below), whose sum is σ = 419627376. Its totient is φ = 79929008.

The previous prime is 199822531. The next prime is 199822543. The reversal of 199822540 is 45228991.

199822540 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 199822493 and 199822502.

It is not an unprimeable number, because it can be changed into a prime (199822543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4995544 + ... + 4995583.

It is an arithmetic number, because the mean of its divisors is an integer number (34968948).

Almost surely, 2^199822540 is an apocalyptic number.

199822540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199822540 is an abundant number, since it is smaller than the sum of its proper divisors (219804836).

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

199822540 is a wasteful number, since it uses less digits than its factorization.

199822540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9991136 (or 9991134 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 199822540 is about 14135.8600728785. The cubic root of 199822540 is about 584.6305310640.

It can be divided in two parts, 19982 and 2540, that added together give a palindrome (22522).

The spelling of 199822540 in words is "one hundred ninety-nine million, eight hundred twenty-two thousand, five hundred forty".