3345216557 has 4 divisors (see below), whose sum is σ = 3354185340. Its totient is φ = 3336247776.

The previous prime is 3345216547. The next prime is 3345216559. The reversal of 3345216557 is 7556125433.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7556125433 = 21089 ⋅358297.

It can be written as a sum of positive squares in 2 ways, for example, as 1615155721 + 1730060836 = 40189^2 + 41594^2 .

It is a cyclic number.

It is not a de Polignac number, because 3345216557 - 2¹² = 3345212461 is a prime.

It is a super-2 number, since 2×3345216557² = 22380947626453868498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3345216559) 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, 4483832 + ... + 4484577.

It is an arithmetic number, because the mean of its divisors is an integer number (838546335).

Almost surely, 2^3345216557 is an apocalyptic number.

It is an amenable number.

3345216557 is a deficient number, since it is larger than the sum of its proper divisors (8968783).

3345216557 is an equidigital number, since it uses as much as digits as its factorization.

3345216557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8968782.

The product of its digits is 378000, while the sum is 41.

The square root of 3345216557 is about 57837.8470985911. The cubic root of 3345216557 is about 1495.5745947728.

The spelling of 3345216557 in words is "three billion, three hundred forty-five million, two hundred sixteen thousand, five hundred fifty-seven".