3219471861 has 16 divisors (see below), whose sum is σ = 4550865408. Its totient is φ = 2020939200.

The previous prime is 3219471839. The next prime is 3219471869. The reversal of 3219471861 is 1681749123.

It is a happy number.

It is not a de Polignac number, because 3219471861 - 2¹⁹ = 3218947573 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3219471869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 464370 + ... + 471251.

It is an arithmetic number, because the mean of its divisors is an integer number (284429088).

Almost surely, 2^3219471861 is an apocalyptic number.

3219471861 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3219471861 is a deficient number, since it is larger than the sum of its proper divisors (1331393547).

3219471861 is a wasteful number, since it uses less digits than its factorization.

3219471861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935692.

The product of its digits is 72576, while the sum is 42.

The square root of 3219471861 is about 56740.3900321455. The cubic root of 3219471861 is about 1476.5955135310.

The spelling of 3219471861 in words is "three billion, two hundred nineteen million, four hundred seventy-one thousand, eight hundred sixty-one".