345545032252261 has 2 divisors, whose sum is σ = 345545032252262. Its totient is φ = 345545032252260.

The previous prime is 345545032252249. The next prime is 345545032252289. The reversal of 345545032252261 is 162252230545543.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192101540404900 + 153443491847361 = 13860070^2 + 12387231^2 .

It is an emirp because it is prime and its reverse (162252230545543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345545032252261 - 2²³ = 345545023863653 is a prime.

It is a super-2 number, since 2×345545032252261² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345545032250261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172772516126130 + 172772516126131.

It is an arithmetic number, because the mean of its divisors is an integer number (172772516126131).

Almost surely, 2^{345545032252261} is an apocalyptic number.

It is an amenable number.

345545032252261 is a deficient number, since it is larger than the sum of its proper divisors (1).

345545032252261 is an equidigital number, since it uses as much as digits as its factorization.

345545032252261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640000, while the sum is 49.

The spelling of 345545032252261 in words is "three hundred forty-five trillion, five hundred forty-five billion, thirty-two million, two hundred fifty-two thousand, two hundred sixty-one".