340221143 has 4 divisors (see below), whose sum is σ = 340348008. Its totient is φ = 340094280.

The previous prime is 340221131. The next prime is 340221173. The reversal of 340221143 is 341122043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 341122043 = 523 ⋅652241.

It is a cyclic number.

It is not a de Polignac number, because 340221143 - 2²⁰ = 339172567 is a prime.

It is a super-2 number, since 2×340221143² = 231500852288452898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340221113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59321 + ... + 64802.

It is an arithmetic number, because the mean of its divisors is an integer number (85087002).

Almost surely, 2^340221143 is an apocalyptic number.

340221143 is a deficient number, since it is larger than the sum of its proper divisors (126865).

340221143 is a wasteful number, since it uses less digits than its factorization.

340221143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126864.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 340221143 is about 18445.0845213569. The cubic root of 340221143 is about 698.1044929399.

Adding to 340221143 its reverse (341122043), we get a palindrome (681343186).

The spelling of 340221143 in words is "three hundred forty million, two hundred twenty-one thousand, one hundred forty-three".