340521143351 has 4 divisors (see below), whose sum is σ = 348440239752. Its totient is φ = 332602046952.

The previous prime is 340521143327. The next prime is 340521143357. The reversal of 340521143351 is 153341125043.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340521143351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340521143357) 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, 3959548136 + ... + 3959548221.

It is an arithmetic number, because the mean of its divisors is an integer number (87110059938).

Almost surely, 2^340521143351 is an apocalyptic number.

340521143351 is a deficient number, since it is larger than the sum of its proper divisors (7919096401).

340521143351 is an equidigital number, since it uses as much as digits as its factorization.

340521143351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7919096400.

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 340521143351 its reverse (153341125043), we get a palindrome (493862268394).

The spelling of 340521143351 in words is "three hundred forty billion, five hundred twenty-one million, one hundred forty-three thousand, three hundred fifty-one".