3031207221 has 16 divisors (see below), whose sum is σ = 4640880128. Its totient is φ = 1723906800.

The previous prime is 3031207211. The next prime is 3031207229. The reversal of 3031207221 is 1227021303.

3031207221 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3031207221 - 2⁷ = 3031207093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3031207229) 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, 337615 + ... + 346476.

It is an arithmetic number, because the mean of its divisors is an integer number (290055008).

Almost surely, 2^3031207221 is an apocalyptic number.

It is an amenable number.

3031207221 is a deficient number, since it is larger than the sum of its proper divisors (1609672907).

3031207221 is a wasteful number, since it uses less digits than its factorization.

3031207221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684312.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 3031207221 is about 55056.4003636271. The cubic root of 3031207221 is about 1447.2332848479.

Adding to 3031207221 its reverse (1227021303), we get a palindrome (4258228524).

The spelling of 3031207221 in words is "three billion, thirty-one million, two hundred seven thousand, two hundred twenty-one".