345216601 has 2 divisors, whose sum is σ = 345216602. Its totient is φ = 345216600.

The previous prime is 345216593. The next prime is 345216661. The reversal of 345216601 is 106612543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 312440976 + 32775625 = 17676^2 + 5725^2 .

It is an emirp because it is prime and its reverse (106612543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345216601 - 2³ = 345216593 is a prime.

It is equal to p_18560323 and since 345216601 and 18560323 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 345216601.

It is not a weakly prime, because it can be changed into another prime (345216661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172608300 + 172608301.

It is an arithmetic number, because the mean of its divisors is an integer number (172608301).

Almost surely, 2^345216601 is an apocalyptic number.

It is an amenable number.

345216601 is a deficient number, since it is larger than the sum of its proper divisors (1).

345216601 is an equidigital number, since it uses as much as digits as its factorization.

345216601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 345216601 is about 18580.0054090412. The cubic root of 345216601 is about 701.5046552516.

The spelling of 345216601 in words is "three hundred forty-five million, two hundred sixteen thousand, six hundred one".