3140628221 has 2 divisors, whose sum is σ = 3140628222. Its totient is φ = 3140628220.

The previous prime is 3140628181. The next prime is 3140628223. The reversal of 3140628221 is 1228260413.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2327580025 + 813048196 = 48245^2 + 28514^2 .

It is a cyclic number.

It is not a de Polignac number, because 3140628221 - 2¹⁸ = 3140366077 is a prime.

Together with 3140628223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3140628223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1570314110 + 1570314111.

It is an arithmetic number, because the mean of its divisors is an integer number (1570314111).

Almost surely, 2^3140628221 is an apocalyptic number.

It is an amenable number.

3140628221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3140628221 is an equidigital number, since it uses as much as digits as its factorization.

3140628221 is an evil number, because the sum of its binary digits is even.

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

The square root of 3140628221 is about 56041.3081663874. The cubic root of 3140628221 is about 1464.4420013023.

Adding to 3140628221 its reverse (1228260413), we get a palindrome (4368888634).

The spelling of 3140628221 in words is "three billion, one hundred forty million, six hundred twenty-eight thousand, two hundred twenty-one".