345520215 has 16 divisors (see below), whose sum is σ = 614258400. Its totient is φ = 184277376.

The previous prime is 345520207. The next prime is 345520249. The reversal of 345520215 is 512025543.

It is a happy number.

345520215 is a `hidden beast` number, since 3 + 455 + 202 + 1 + 5 = 666.

It is not a de Polignac number, because 345520215 - 2³ = 345520207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1279570 + ... + 1279839.

It is an arithmetic number, because the mean of its divisors is an integer number (38391150).

Almost surely, 2^345520215 is an apocalyptic number.

345520215 is a deficient number, since it is larger than the sum of its proper divisors (268738185).

345520215 is a wasteful number, since it uses less digits than its factorization.

345520215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2559423 (or 2559417 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 345520215 is about 18588.1740630972. The cubic root of 345520215 is about 701.7102500623.

Adding to 345520215 its reverse (512025543), we get a palindrome (857545758).

The spelling of 345520215 in words is "three hundred forty-five million, five hundred twenty thousand, two hundred fifteen".