199217842 has 16 divisors (see below), whose sum is σ = 316806912. Its totient is φ = 93789360.

The previous prime is 199217827. The next prime is 199217897. The reversal of 199217842 is 248712991.

It is a happy number.

It is a super-2 number, since 2×199217842² = 79375497142273928, which contains 22 as substring.

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, 41128 + ... + 45715.

It is an arithmetic number, because the mean of its divisors is an integer number (19800432).

Almost surely, 2^199217842 is an apocalyptic number.

199217842 is a deficient number, since it is larger than the sum of its proper divisors (117589070).

199217842 is a wasteful number, since it uses less digits than its factorization.

199217842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86913.

The product of its digits is 72576, while the sum is 43.

The square root of 199217842 is about 14114.4550727260. The cubic root of 199217842 is about 584.0402037281.

The spelling of 199217842 in words is "one hundred ninety-nine million, two hundred seventeen thousand, eight hundred forty-two".