345147561 has 20 divisors (see below), whose sum is σ = 562464144. Its totient is φ = 209179800.

The previous prime is 345147533. The next prime is 345147563. The reversal of 345147561 is 165741543.

345147561 is a `hidden beast` number, since 3 + 4 + 51 + 47 + 561 = 666.

It is not a de Polignac number, because 345147561 - 2¹⁸ = 344885417 is a prime.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (345147563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 192795 + ... + 194576.

Almost surely, 2^345147561 is an apocalyptic number.

It is an amenable number.

345147561 is a deficient number, since it is larger than the sum of its proper divisors (217316583).

345147561 is a wasteful number, since it uses less digits than its factorization.

345147561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387394 (or 387385 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 345147561 is about 18578.1474049486. The cubic root of 345147561 is about 701.4578874057.

The spelling of 345147561 in words is "three hundred forty-five million, one hundred forty-seven thousand, five hundred sixty-one".