199142955 has 40 divisors (see below), whose sum is σ = 389443824. Its totient is φ = 96552000.

The previous prime is 199142939. The next prime is 199142959. The reversal of 199142955 is 559241991.

It is not a de Polignac number, because 199142955 - 2⁴ = 199142939 is a prime.

It is a super-2 number, since 2×199142955² = 79315833052264050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 199142955.

It is not an unprimeable number, because it can be changed into a prime (199142959) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 17896 + ... + 26805.

Almost surely, 2^199142955 is an apocalyptic number.

199142955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

199142955 is a deficient number, since it is larger than the sum of its proper divisors (190300869).

199142955 is a wasteful number, since it uses less digits than its factorization.

199142955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44729 (or 44720 counting only the distinct ones).

The product of its digits is 145800, while the sum is 45.

The square root of 199142955 is about 14111.8019756514. The cubic root of 199142955 is about 583.9670133288.

The spelling of 199142955 in words is "one hundred ninety-nine million, one hundred forty-two thousand, nine hundred fifty-five".