199518054 has 64 divisors (see below), whose sum is σ = 431101440. Its totient is φ = 61402880.

The previous prime is 199518049. The next prime is 199518061. The reversal of 199518054 is 450815991.

It is a junction number, because it is equal to n+sod(n) for n = 199517997 and 199518015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1012684 + ... + 1012880.

It is an arithmetic number, because the mean of its divisors is an integer number (6735960).

Almost surely, 2^199518054 is an apocalyptic number.

199518054 is an abundant number, since it is smaller than the sum of its proper divisors (231583386).

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

199518054 is a wasteful number, since it uses less digits than its factorization.

199518054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445.

The product of its (nonzero) digits is 64800, while the sum is 42.

The square root of 199518054 is about 14125.0859820392. The cubic root of 199518054 is about 584.3334302705. Note that the first 3 decimals are identical.

The spelling of 199518054 in words is "one hundred ninety-nine million, five hundred eighteen thousand, fifty-four".