345523561 has 2 divisors, whose sum is σ = 345523562. Its totient is φ = 345523560.

The previous prime is 345523513. The next prime is 345523571. The reversal of 345523561 is 165325543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 334341225 + 11182336 = 18285^2 + 3344^2 .

It is a cyclic number.

It is not a de Polignac number, because 345523561 - 2⁷ = 345523433 is a prime.

It is a super-2 number, since 2×345523561² = 238773062412241442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (345523511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172761780 + 172761781.

It is an arithmetic number, because the mean of its divisors is an integer number (172761781).

Almost surely, 2^345523561 is an apocalyptic number.

It is an amenable number.

345523561 is a deficient number, since it is larger than the sum of its proper divisors (1).

345523561 is an equidigital number, since it uses as much as digits as its factorization.

345523561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54000, while the sum is 34.

The square root of 345523561 is about 18588.2640663404. The cubic root of 345523561 is about 701.7125151636.

The spelling of 345523561 in words is "three hundred forty-five million, five hundred twenty-three thousand, five hundred sixty-one".