3915221067 has 12 divisors (see below), whose sum is σ = 5850330720. Its totient is φ = 2520142128.

The previous prime is 3915221059. The next prime is 3915221071. The reversal of 3915221067 is 7601225193.

3915221067 is a `hidden beast` number, since 391 + 52 + 210 + 6 + 7 = 666.

3915221067 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3915221067 - 2³ = 3915221059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3915221017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7500163 + ... + 7500684.

It is an arithmetic number, because the mean of its divisors is an integer number (487527560).

Almost surely, 2^3915221067 is an apocalyptic number.

3915221067 is a deficient number, since it is larger than the sum of its proper divisors (1935109653).

3915221067 is a wasteful number, since it uses less digits than its factorization.

3915221067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15000882 (or 15000879 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 3915221067 is about 62571.7273774666. The cubic root of 3915221067 is about 1576.1060264490.

The spelling of 3915221067 in words is "three billion, nine hundred fifteen million, two hundred twenty-one thousand, sixty-seven".