3415131221 has 4 divisors (see below), whose sum is σ = 3415986252. Its totient is φ = 3414276192.

The previous prime is 3415131163. The next prime is 3415131253. The reversal of 3415131221 is 1221315143.

3415131221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1221315143 = 257 ⋅4752199.

It can be written as a sum of positive squares in 2 ways, for example, as 1180678321 + 2234452900 = 34361^2 + 47270^2 .

It is a cyclic number.

It is not a de Polignac number, because 3415131221 - 2⁶ = 3415131157 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 (3415131271) 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, 421496 + ... + 429521.

It is an arithmetic number, because the mean of its divisors is an integer number (853996563).

Almost surely, 2^3415131221 is an apocalyptic number.

It is an amenable number.

3415131221 is a deficient number, since it is larger than the sum of its proper divisors (855031).

3415131221 is an equidigital number, since it uses as much as digits as its factorization.

3415131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855030.

The product of its digits is 720, while the sum is 23.

The square root of 3415131221 is about 58439.1240608550. The cubic root of 3415131221 is about 1505.9219556012.

Adding to 3415131221 its reverse (1221315143), we get a palindrome (4636446364).

The spelling of 3415131221 in words is "three billion, four hundred fifteen million, one hundred thirty-one thousand, two hundred twenty-one".