345310561 has 4 divisors (see below), whose sum is σ = 345424324. Its totient is φ = 345196800.

The previous prime is 345310549. The next prime is 345310577. The reversal of 345310561 is 165013543.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47541025 + 297769536 = 6895^2 + 17256^2 .

It is a cyclic number.

It is not a de Polignac number, because 345310561 - 2²³ = 336921953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345310261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52200 + ... + 58441.

It is an arithmetic number, because the mean of its divisors is an integer number (86356081).

Almost surely, 2^345310561 is an apocalyptic number.

It is an amenable number.

345310561 is a deficient number, since it is larger than the sum of its proper divisors (113763).

345310561 is a wasteful number, since it uses less digits than its factorization.

345310561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113762.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 345310561 is about 18582.5337615730. The cubic root of 345310561 is about 701.5682939431.

The spelling of 345310561 in words is "three hundred forty-five million, three hundred ten thousand, five hundred sixty-one".