345521313 has 6 divisors (see below), whose sum is σ = 499086354. Its totient is φ = 230347536.

The previous prime is 345521291. The next prime is 345521321. The reversal of 345521313 is 313125543.

345521313 is a `hidden beast` number, since 345 + 5 + 2 + 1 + 313 = 666.

It can be written as a sum of positive squares in only one way, i.e., 345513744 + 7569 = 18588^2 + 87^2 .

It is a de Polignac number, because none of the positive numbers 2^k-345521313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (345521333) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19195620 + ... + 19195637.

It is an arithmetic number, because the mean of its divisors is an integer number (83181059).

Almost surely, 2^345521313 is an apocalyptic number.

It is an amenable number.

345521313 is a deficient number, since it is larger than the sum of its proper divisors (153565041).

345521313 is a wasteful number, since it uses less digits than its factorization.

345521313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38391263 (or 38391260 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 345521313 is about 18588.2035979812. The cubic root of 345521313 is about 701.7109933637.

Adding to 345521313 its reverse (313125543), we get a palindrome (658646856).

The spelling of 345521313 in words is "three hundred forty-five million, five hundred twenty-one thousand, three hundred thirteen".