343971561 has 16 divisors (see below), whose sum is σ = 464961600. Its totient is φ = 226161408.

The previous prime is 343971553. The next prime is 343971569. The reversal of 343971561 is 165179343.

It is an interprime number because it is at equal distance from previous prime (343971553) and next prime (343971569).

It is not a de Polignac number, because 343971561 - 2³ = 343971553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (343971569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120610 + ... + 123428.

It is an arithmetic number, because the mean of its divisors is an integer number (29060100).

Almost surely, 2^343971561 is an apocalyptic number.

It is an amenable number.

343971561 is a deficient number, since it is larger than the sum of its proper divisors (120990039).

343971561 is a wasteful number, since it uses less digits than its factorization.

343971561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3368.

The product of its digits is 68040, while the sum is 39.

The square root of 343971561 is about 18546.4703110862. The cubic root of 343971561 is about 700.6603027977.

The spelling of 343971561 in words is "three hundred forty-three million, nine hundred seventy-one thousand, five hundred sixty-one".