354513123554221 has 16 divisors (see below), whose sum is σ = 373215358567744. Its totient is φ = 336427834748544.

The previous prime is 354513123554173. The next prime is 354513123554279. The reversal of 354513123554221 is 122455321315453.

It is a cyclic number.

It is not a de Polignac number, because 354513123554221 - 2¹⁷ = 354513123423149 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 (354513123557221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 842612346 + ... + 843032971.

It is an arithmetic number, because the mean of its divisors is an integer number (23325959910484).

Almost surely, 2^{354513123554221} is an apocalyptic number.

It is an amenable number.

354513123554221 is a deficient number, since it is larger than the sum of its proper divisors (18702235013523).

354513123554221 is a wasteful number, since it uses less digits than its factorization.

354513123554221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685645500.

The product of its digits is 2160000, while the sum is 46.

Adding to 354513123554221 its reverse (122455321315453), we get a palindrome (476968444869674).

The spelling of 354513123554221 in words is "three hundred fifty-four trillion, five hundred thirteen billion, one hundred twenty-three million, five hundred fifty-four thousand, two hundred twenty-one".