345503281 has 2 divisors, whose sum is σ = 345503282. Its totient is φ = 345503280.

The previous prime is 345503267. The next prime is 345503293. The reversal of 345503281 is 182305543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206640625 + 138862656 = 14375^2 + 11784^2 .

It is a cyclic number.

It is not a de Polignac number, because 345503281 - 2⁹ = 345502769 is a prime.

It is a super-2 number, since 2×345503281² = 238745034363529922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (345503681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172751640 + 172751641.

It is an arithmetic number, because the mean of its divisors is an integer number (172751641).

Almost surely, 2^345503281 is an apocalyptic number.

It is an amenable number.

345503281 is a deficient number, since it is larger than the sum of its proper divisors (1).

345503281 is an equidigital number, since it uses as much as digits as its factorization.

345503281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 345503281 is about 18587.7185528510. The cubic root of 345503281 is about 701.6987862318.

The spelling of 345503281 in words is "three hundred forty-five million, five hundred three thousand, two hundred eighty-one".