191016442 has 4 divisors (see below), whose sum is σ = 286524666. Its totient is φ = 95508220.

The previous prime is 191016421. The next prime is 191016467. The reversal of 191016442 is 244610191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244610191 = 7 ⋅34944313.

It can be written as a sum of positive squares in only one way, i.e., 166126321 + 24890121 = 12889^2 + 4989^2 .

It is a super-2 number, since 2×191016442² = 72974562228678728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 191016442.

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 as a sum of consecutive naturals, namely, 47754109 + ... + 47754112.

Almost surely, 2^191016442 is an apocalyptic number.

191016442 is a deficient number, since it is larger than the sum of its proper divisors (95508224).

191016442 is an equidigital number, since it uses as much as digits as its factorization.

191016442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95508223.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 191016442 is about 13820.8697989671. The cubic root of 191016442 is about 575.9130466896.

The spelling of 191016442 in words is "one hundred ninety-one million, sixteen thousand, four hundred forty-two".