3948264221 has 4 divisors (see below), whose sum is σ = 4307197344. Its totient is φ = 3589331100.

The previous prime is 3948264217. The next prime is 3948264251. The reversal of 3948264221 is 1224628493.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1224628493 = 11 ⋅111329863.

It is a cyclic number.

It is not a de Polignac number, because 3948264221 - 2² = 3948264217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3948264211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179466545 + ... + 179466566.

It is an arithmetic number, because the mean of its divisors is an integer number (1076799336).

Almost surely, 2^3948264221 is an apocalyptic number.

It is an amenable number.

3948264221 is a deficient number, since it is larger than the sum of its proper divisors (358933123).

3948264221 is a wasteful number, since it uses less digits than its factorization.

3948264221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358933122.

The product of its digits is 165888, while the sum is 41.

The square root of 3948264221 is about 62835.2148162159. The cubic root of 3948264221 is about 1580.5275465585.

The spelling of 3948264221 in words is "three billion, nine hundred forty-eight million, two hundred sixty-four thousand, two hundred twenty-one".