3151340221 has 2 divisors, whose sum is σ = 3151340222. Its totient is φ = 3151340220.

The previous prime is 3151340173. The next prime is 3151340251. The reversal of 3151340221 is 1220431513.

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., 3116988900 + 34351321 = 55830^2 + 5861^2 .

It is a cyclic number.

It is not a de Polignac number, because 3151340221 - 2¹¹ = 3151338173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3151340192 and 3151340201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3151340251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1575670110 + 1575670111.

It is an arithmetic number, because the mean of its divisors is an integer number (1575670111).

Almost surely, 2^3151340221 is an apocalyptic number.

It is an amenable number.

3151340221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3151340221 is an equidigital number, since it uses as much as digits as its factorization.

3151340221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 3151340221 is about 56136.7991695287. The cubic root of 3151340221 is about 1466.1050763556.

Adding to 3151340221 its reverse (1220431513), we get a palindrome (4371771734).

The spelling of 3151340221 in words is "three billion, one hundred fifty-one million, three hundred forty thousand, two hundred twenty-one".