345422557 has 2 divisors, whose sum is σ = 345422558. Its totient is φ = 345422556.

The previous prime is 345422477. The next prime is 345422563. The reversal of 345422557 is 755224543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 324756441 + 20666116 = 18021^2 + 4546^2 .

It is an emirp because it is prime and its reverse (755224543) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345422557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345432557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172711278 + 172711279.

It is an arithmetic number, because the mean of its divisors is an integer number (172711279).

Almost surely, 2^345422557 is an apocalyptic number.

It is an amenable number.

345422557 is a deficient number, since it is larger than the sum of its proper divisors (1).

345422557 is an equidigital number, since it uses as much as digits as its factorization.

345422557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 168000, while the sum is 37.

The square root of 345422557 is about 18585.5469922195. The cubic root of 345422557 is about 701.6441332584.

The spelling of 345422557 in words is "three hundred forty-five million, four hundred twenty-two thousand, five hundred fifty-seven".