3218145257 has 8 divisors (see below), whose sum is σ = 3358884480. Its totient is φ = 3077474400.

The previous prime is 3218145233. The next prime is 3218145299. The reversal of 3218145257 is 7525418123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3218145257 - 2¹⁰ = 3218144233 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3218145257.

It is not an unprimeable number, because it can be changed into a prime (3218145157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94757 + ... + 124157.

It is an arithmetic number, because the mean of its divisors is an integer number (419860560).

Almost surely, 2^3218145257 is an apocalyptic number.

It is an amenable number.

3218145257 is a deficient number, since it is larger than the sum of its proper divisors (140739223).

3218145257 is a wasteful number, since it uses less digits than its factorization.

3218145257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34183.

The product of its digits is 67200, while the sum is 38.

The square root of 3218145257 is about 56728.6987070918. The cubic root of 3218145257 is about 1476.3926721216.

The spelling of 3218145257 in words is "three billion, two hundred eighteen million, one hundred forty-five thousand, two hundred fifty-seven".