343343561 has 4 divisors (see below), whose sum is σ = 374556624. Its totient is φ = 312130500.

The previous prime is 343343549. The next prime is 343343573. The reversal of 343343561 is 165343343.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (343343549) and next prime (343343573).

It is not a de Polignac number, because 343343561 - 2¹⁰ = 343342537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (343340561) 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 in 3 ways as a sum of consecutive naturals, for example, 15606515 + ... + 15606536.

It is an arithmetic number, because the mean of its divisors is an integer number (93639156).

Almost surely, 2^343343561 is an apocalyptic number.

It is an amenable number.

343343561 is a deficient number, since it is larger than the sum of its proper divisors (31213063).

343343561 is a wasteful number, since it uses less digits than its factorization.

343343561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31213062.

The product of its digits is 38880, while the sum is 32.

The square root of 343343561 is about 18529.5321311683. The cubic root of 343343561 is about 700.2336369770.

The spelling of 343343561 in words is "three hundred forty-three million, three hundred forty-three thousand, five hundred sixty-one".