354243021123503 has 4 divisors (see below), whose sum is σ = 354243166669680. Its totient is φ = 354242875577328.

The previous prime is 354243021123469. The next prime is 354243021123671. The reversal of 354243021123503 is 305321120342453.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-354243021123503 is a prime.

It is a super-3 number, since 3×354243021123503³ (a number of 45 digits) contains 333 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 (354243021123703) 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, 69059075 + ... + 74011092.

It is an arithmetic number, because the mean of its divisors is an integer number (88560791667420).

Almost surely, 2^{354243021123503} is an apocalyptic number.

354243021123503 is a deficient number, since it is larger than the sum of its proper divisors (145546177).

354243021123503 is a wasteful number, since it uses less digits than its factorization.

354243021123503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145546176.

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

Adding to 354243021123503 its reverse (305321120342453), we get a palindrome (659564141465956).

The spelling of 354243021123503 in words is "three hundred fifty-four trillion, two hundred forty-three billion, twenty-one million, one hundred twenty-three thousand, five hundred three".