345521543 has 2 divisors, whose sum is σ = 345521544. Its totient is φ = 345521542.

The previous prime is 345521537. The next prime is 345521557. The reversal of 345521543 is 345125543.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345521543 is a prime.

It is a super-3 number, since 3×345521543³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345521513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172760771 + 172760772.

It is an arithmetic number, because the mean of its divisors is an integer number (172760772).

Almost surely, 2^345521543 is an apocalyptic number.

345521543 is a deficient number, since it is larger than the sum of its proper divisors (1).

345521543 is an equidigital number, since it uses as much as digits as its factorization.

345521543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36000, while the sum is 32.

The square root of 345521543 is about 18588.2097846995. The cubic root of 345521543 is about 701.7111490642.

The spelling of 345521543 in words is "three hundred forty-five million, five hundred twenty-one thousand, five hundred forty-three".