3243213657 has 48 divisors (see below), whose sum is σ = 4874688000. Its totient is φ = 2076641280.

The previous prime is 3243213643. The next prime is 3243213671. The reversal of 3243213657 is 7563123423.

3243213657 is a `hidden beast` number, since 324 + 321 + 3 + 6 + 5 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (3243213643) and next prime (3243213671).

It is not a de Polignac number, because 3243213657 - 2⁸ = 3243213401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3243213257) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7222969 + ... + 7223417.

It is an arithmetic number, because the mean of its divisors is an integer number (101556000).

Almost surely, 2^3243213657 is an apocalyptic number.

It is an amenable number.

3243213657 is a deficient number, since it is larger than the sum of its proper divisors (1631474343).

3243213657 is a wasteful number, since it uses less digits than its factorization.

3243213657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798 (or 795 counting only the distinct ones).

The product of its digits is 90720, while the sum is 36.

The square root of 3243213657 is about 56949.2199858786. The cubic root of 3243213657 is about 1480.2163150159.

The spelling of 3243213657 in words is "three billion, two hundred forty-three million, two hundred thirteen thousand, six hundred fifty-seven".