345547481 has 2 divisors, whose sum is σ = 345547482. Its totient is φ = 345547480.

The previous prime is 345547453. The next prime is 345547523. The reversal of 345547481 is 184745543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 280261081 + 65286400 = 16741^2 + 8080^2 .

It is a cyclic number.

It is not a de Polignac number, because 345547481 - 2⁶ = 345547417 is a prime.

It is a super-2 number, since 2×345547481² = 238806123250890722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (345547451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172773740 + 172773741.

It is an arithmetic number, because the mean of its divisors is an integer number (172773741).

Almost surely, 2^345547481 is an apocalyptic number.

It is an amenable number.

345547481 is a deficient number, since it is larger than the sum of its proper divisors (1).

345547481 is an equidigital number, since it uses as much as digits as its factorization.

345547481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 268800, while the sum is 41.

The square root of 345547481 is about 18588.9074719307. The cubic root of 345547481 is about 701.7287075722.

The spelling of 345547481 in words is "three hundred forty-five million, five hundred forty-seven thousand, four hundred eighty-one".