354234200521 has 4 divisors (see below), whose sum is σ = 375071506452. Its totient is φ = 333396894592.

The previous prime is 354234200503. The next prime is 354234200527. The reversal of 354234200521 is 125002432453.

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 225184415296 + 129049785225 = 474536^2 + 359235^2 .

It is a cyclic number.

It is not a de Polignac number, because 354234200521 - 2⁹ = 354234200009 is a prime.

It is a super-3 number, since 3×354234200521³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (354234200527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10418652940 + ... + 10418652973.

It is an arithmetic number, because the mean of its divisors is an integer number (93767876613).

Almost surely, 2^354234200521 is an apocalyptic number.

It is an amenable number.

354234200521 is a deficient number, since it is larger than the sum of its proper divisors (20837305931).

354234200521 is a wasteful number, since it uses less digits than its factorization.

354234200521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20837305930.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 354234200521 its reverse (125002432453), we get a palindrome (479236632974).

The spelling of 354234200521 in words is "three hundred fifty-four billion, two hundred thirty-four million, two hundred thousand, five hundred twenty-one".