3398151821 has 8 divisors (see below), whose sum is σ = 3551572920. Its totient is φ = 3247147008.

The previous prime is 3398151781. The next prime is 3398151851. The reversal of 3398151821 is 1281518933.

It can be written as a sum of positive squares in 4 ways, for example, as 2758921 + 3395392900 = 1661^2 + 58270^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3398151821 - 2¹⁰ = 3398150797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3398151851) 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 7 ways as a sum of consecutive naturals, for example, 601196 + ... + 606821.

It is an arithmetic number, because the mean of its divisors is an integer number (443946615).

Almost surely, 2^3398151821 is an apocalyptic number.

It is an amenable number.

3398151821 is a deficient number, since it is larger than the sum of its proper divisors (153421099).

3398151821 is a wasteful number, since it uses less digits than its factorization.

3398151821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1208143.

The product of its digits is 51840, while the sum is 41.

The square root of 3398151821 is about 58293.6687900153. The cubic root of 3398151821 is about 1503.4220863537.

The spelling of 3398151821 in words is "three billion, three hundred ninety-eight million, one hundred fifty-one thousand, eight hundred twenty-one".