199657055 has 8 divisors (see below), whose sum is σ = 258018432. Its totient is φ = 147439008.

The previous prime is 199657049. The next prime is 199657063. The reversal of 199657055 is 550756991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 199657055 - 2⁴ = 199657039 is a prime.

It is a super-2 number, since 2×199657055² = 79725879222546050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1535759 + ... + 1535888.

It is an arithmetic number, because the mean of its divisors is an integer number (32252304).

Almost surely, 2^199657055 is an apocalyptic number.

199657055 is a deficient number, since it is larger than the sum of its proper divisors (58361377).

199657055 is a wasteful number, since it uses less digits than its factorization.

199657055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3071665.

The product of its (nonzero) digits is 425250, while the sum is 47.

The square root of 199657055 is about 14130.0054847831. The cubic root of 199657055 is about 584.4690973185.

The spelling of 199657055 in words is "one hundred ninety-nine million, six hundred fifty-seven thousand, fifty-five".