3538144021 has 4 divisors (see below), whose sum is σ = 3596146444. Its totient is φ = 3480141600.

The previous prime is 3538144019. The next prime is 3538144079. The reversal of 3538144021 is 1204418353.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 544522225 + 2993621796 = 23335^2 + 54714^2 .

It is a cyclic number.

It is not a de Polignac number, because 3538144021 - 2¹ = 3538144019 is a prime.

It is a super-2 number, since 2×3538144021² = 25036926226676096882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3538154021) 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, 29001120 + ... + 29001241.

It is an arithmetic number, because the mean of its divisors is an integer number (899036611).

Almost surely, 2^3538144021 is an apocalyptic number.

It is an amenable number.

3538144021 is a deficient number, since it is larger than the sum of its proper divisors (58002423).

3538144021 is an equidigital number, since it uses as much as digits as its factorization.

3538144021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58002422.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 3538144021 is about 59482.3000648092. The cubic root of 3538144021 is about 1523.7901748920.

The spelling of 3538144021 in words is "three billion, five hundred thirty-eight million, one hundred forty-four thousand, twenty-one".