3138144221 has 8 divisors (see below), whose sum is σ = 3188346240. Its totient is φ = 3088137312.

The previous prime is 3138144211. The next prime is 3138144281. The reversal of 3138144221 is 1224418313.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3138144221 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 (3138144211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16181 + ... + 80858.

It is an arithmetic number, because the mean of its divisors is an integer number (398543280).

Almost surely, 2^3138144221 is an apocalyptic number.

It is an amenable number.

3138144221 is a deficient number, since it is larger than the sum of its proper divisors (50202019).

3138144221 is an equidigital number, since it uses as much as digits as its factorization.

3138144221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97555.

The product of its digits is 4608, while the sum is 29.

The square root of 3138144221 is about 56019.1415589350. The cubic root of 3138144221 is about 1464.0558117527.

The spelling of 3138144221 in words is "three billion, one hundred thirty-eight million, one hundred forty-four thousand, two hundred twenty-one".