354405235321 has 2 divisors, whose sum is σ = 354405235322. Its totient is φ = 354405235320.

The previous prime is 354405235313. The next prime is 354405235409. The reversal of 354405235321 is 123532504453.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 338374890000 + 16030345321 = 581700^2 + 126611^2 .

It is a cyclic number.

It is not a de Polignac number, because 354405235321 - 2³ = 354405235313 is a prime.

It is not a weakly prime, because it can be changed into another prime (354405035321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177202617660 + 177202617661.

It is an arithmetic number, because the mean of its divisors is an integer number (177202617661).

Almost surely, 2^354405235321 is an apocalyptic number.

It is an amenable number.

354405235321 is a deficient number, since it is larger than the sum of its proper divisors (1).

354405235321 is an equidigital number, since it uses as much as digits as its factorization.

354405235321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216000, while the sum is 37.

Adding to 354405235321 its reverse (123532504453), we get a palindrome (477937739774).

The spelling of 354405235321 in words is "three hundred fifty-four billion, four hundred five million, two hundred thirty-five thousand, three hundred twenty-one".