3151225221 has 16 divisors (see below), whose sum is σ = 4464115200. Its totient is φ = 1971643248.

The previous prime is 3151225177. The next prime is 3151225229. The reversal of 3151225221 is 1225221513.

It is not a de Polignac number, because 3151225221 - 2¹³ = 3151217029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3151225191 and 3151225200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3151225229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252241 + ... + 264438.

It is an arithmetic number, because the mean of its divisors is an integer number (279007200).

Almost surely, 2^3151225221 is an apocalyptic number.

It is an amenable number.

3151225221 is a deficient number, since it is larger than the sum of its proper divisors (1312889979).

3151225221 is a wasteful number, since it uses less digits than its factorization.

3151225221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516808.

The product of its digits is 1200, while the sum is 24.

The square root of 3151225221 is about 56135.7748766328. The cubic root of 3151225221 is about 1466.0872422361.

Adding to 3151225221 its reverse (1225221513), we get a palindrome (4376446734).

The spelling of 3151225221 in words is "three billion, one hundred fifty-one million, two hundred twenty-five thousand, two hundred twenty-one".