355143334421 has 4 divisors (see below), whose sum is σ = 356037902412. Its totient is φ = 354248766432.

The previous prime is 355143334393. The next prime is 355143334451. The reversal of 355143334421 is 124433341553.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124433341553 = 5393 ⋅23073121.

It can be written as a sum of positive squares in 2 ways, for example, as 315887837521 + 39255496900 = 562039^2 + 198130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-355143334421 is a prime.

It is a super-2 number, since 2×355143334421² (a number of 24 digits) 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 (355143334451) 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, 447283400 + ... + 447284193.

It is an arithmetic number, because the mean of its divisors is an integer number (89009475603).

Almost surely, 2^355143334421 is an apocalyptic number.

It is an amenable number.

355143334421 is a deficient number, since it is larger than the sum of its proper divisors (894567991).

355143334421 is an equidigital number, since it uses as much as digits as its factorization.

355143334421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894567990.

The product of its digits is 259200, while the sum is 38.

Adding to 355143334421 its reverse (124433341553), we get a palindrome (479576675974).

The spelling of 355143334421 in words is "three hundred fifty-five billion, one hundred forty-three million, three hundred thirty-four thousand, four hundred twenty-one".