354115454521 has 4 divisors (see below), whose sum is σ = 354186896932. Its totient is φ = 354044012112.

The previous prime is 354115454491. The next prime is 354115454527. The reversal of 354115454521 is 125454511453.

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

It can be written as a sum of positive squares in 2 ways, for example, as 136925901225 + 217189553296 = 370035^2 + 466036^2 .

It is a cyclic number.

It is not a de Polignac number, because 354115454521 - 2¹¹ = 354115452473 is a prime.

It is a super-2 number, since 2×354115454521² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (354115454527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35713770 + ... + 35723683.

It is an arithmetic number, because the mean of its divisors is an integer number (88546724233).

Almost surely, 2^354115454521 is an apocalyptic number.

It is an amenable number.

354115454521 is a deficient number, since it is larger than the sum of its proper divisors (71442411).

354115454521 is an equidigital number, since it uses as much as digits as its factorization.

354115454521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71442410.

The product of its digits is 240000, while the sum is 40.

Adding to 354115454521 its reverse (125454511453), we get a palindrome (479569965974).

The spelling of 354115454521 in words is "three hundred fifty-four billion, one hundred fifteen million, four hundred fifty-four thousand, five hundred twenty-one".