419216681 has 4 divisors (see below), whose sum is σ = 451464132. Its totient is φ = 386969232.

The previous prime is 419216671. The next prime is 419216683. The reversal of 419216681 is 186612914.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 186612914 = 2 ⋅93306457.

It can be written as a sum of positive squares in 2 ways, for example, as 22848400 + 396368281 = 4780^2 + 19909^2 .

It is not a de Polignac number, because 419216681 - 2¹⁸ = 418954537 is a prime.

It is a super-2 number, since 2×419216681² = 351485251257311522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (419216683) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 16123706 + ... + 16123731.

It is an arithmetic number, because the mean of its divisors is an integer number (112866033).

Almost surely, 2^419216681 is an apocalyptic number.

It is an amenable number.

419216681 is a deficient number, since it is larger than the sum of its proper divisors (32247451).

419216681 is a wasteful number, since it uses less digits than its factorization.

419216681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32247450.

The product of its digits is 20736, while the sum is 38.

The square root of 419216681 is about 20474.7815861366. The cubic root of 419216681 is about 748.4213794594.

The spelling of 419216681 in words is "four hundred nineteen million, two hundred sixteen thousand, six hundred eighty-one".