3145353221 has 4 divisors (see below), whose sum is σ = 3145959744. Its totient is φ = 3144746700.

The previous prime is 3145353203. The next prime is 3145353259. The reversal of 3145353221 is 1223535413.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3145353221 - 2¹⁴ = 3145336837 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 (3145353521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 295415 + ... + 305876.

It is an arithmetic number, because the mean of its divisors is an integer number (786489936).

Almost surely, 2^3145353221 is an apocalyptic number.

It is an amenable number.

3145353221 is a deficient number, since it is larger than the sum of its proper divisors (606523).

3145353221 is an equidigital number, since it uses as much as digits as its factorization.

3145353221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606522.

The product of its digits is 10800, while the sum is 29.

The square root of 3145353221 is about 56083.4487259833. The cubic root of 3145353221 is about 1465.1760392929.

Adding to 3145353221 its reverse (1223535413), we get a palindrome (4368888634).

It can be divided in two parts, 314 and 5353221, that added together give a palindrome (5353535).

The spelling of 3145353221 in words is "three billion, one hundred forty-five million, three hundred fifty-three thousand, two hundred twenty-one".