345565505 has 16 divisors (see below), whose sum is σ = 418509504. Its totient is φ = 273912000.

The previous prime is 345565499. The next prime is 345565531. The reversal of 345565505 is 505565543.

It is not a de Polignac number, because 345565505 - 2⁴ = 345565489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 284279 + ... + 285491.

It is an arithmetic number, because the mean of its divisors is an integer number (26156844).

Almost surely, 2^345565505 is an apocalyptic number.

It is an amenable number.

345565505 is a deficient number, since it is larger than the sum of its proper divisors (72943999).

345565505 is a wasteful number, since it uses less digits than its factorization.

345565505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1696.

The product of its (nonzero) digits is 225000, while the sum is 38.

The square root of 345565505 is about 18589.3922708624. The cubic root of 345565505 is about 701.7409082480.

Adding to 345565505 its sum of digits (38), we get a palindrome (345565543).

The spelling of 345565505 in words is "three hundred forty-five million, five hundred sixty-five thousand, five hundred five".