199431455 has 8 divisors (see below), whose sum is σ = 239415504. Its totient is φ = 159480000.

The previous prime is 199431433. The next prime is 199431461. The reversal of 199431455 is 554134991.

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

It is not a de Polignac number, because 199431455 - 2²² = 195237151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8360 + ... + 21650.

It is an arithmetic number, because the mean of its divisors is an integer number (29926938).

Almost surely, 2^199431455 is an apocalyptic number.

199431455 is a deficient number, since it is larger than the sum of its proper divisors (39984049).

199431455 is a wasteful number, since it uses less digits than its factorization.

199431455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16297.

The product of its digits is 97200, while the sum is 41.

The square root of 199431455 is about 14122.0202166687. The cubic root of 199431455 is about 584.2488764959.

The spelling of 199431455 in words is "one hundred ninety-nine million, four hundred thirty-one thousand, four hundred fifty-five".