345421216215 has 24 divisors (see below), whose sum is σ = 608878080720. Its totient is φ = 181102195584.

The previous prime is 345421216211. The next prime is 345421216243. The reversal of 345421216215 is 512612124543.

345421216215 is a `hidden beast` number, since 3 + 4 + 5 + 4 + 2 + 1 + 21 + 621 + 5 = 666.

It is not a de Polignac number, because 345421216215 - 2² = 345421216211 is a prime.

It is a super-5 number, since 5×345421216215⁵ (a number of 59 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 345421216215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345421216211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65048422 + ... + 65053731.

It is an arithmetic number, because the mean of its divisors is an integer number (25369920030).

Almost surely, 2^345421216215 is an apocalyptic number.

345421216215 is a deficient number, since it is larger than the sum of its proper divisors (263456864505).

345421216215 is a wasteful number, since it uses less digits than its factorization.

345421216215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130102223 (or 130102220 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The spelling of 345421216215 in words is "three hundred forty-five billion, four hundred twenty-one million, two hundred sixteen thousand, two hundred fifteen".