3545223421 has 4 divisors (see below), whose sum is σ = 3545887644. Its totient is φ = 3544559200.

The previous prime is 3545223377. The next prime is 3545223463. The reversal of 3545223421 is 1243225453.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1243225453 = 17 ⋅73130909.

It can be written as a sum of positive squares in 2 ways, for example, as 2380366521 + 1164856900 = 48789^2 + 34130^2 .

It is a cyclic number.

It is not a de Polignac number, because 3545223421 - 2¹¹ = 3545221373 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 (3545223491) 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, 324040 + ... + 334801.

It is an arithmetic number, because the mean of its divisors is an integer number (886471911).

Almost surely, 2^3545223421 is an apocalyptic number.

It is an amenable number.

3545223421 is a deficient number, since it is larger than the sum of its proper divisors (664223).

3545223421 is an equidigital number, since it uses as much as digits as its factorization.

3545223421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664222.

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

The square root of 3545223421 is about 59541.7787859919. The cubic root of 3545223421 is about 1524.8058046727.

Adding to 3545223421 its reverse (1243225453), we get a palindrome (4788448874).

The spelling of 3545223421 in words is "three billion, five hundred forty-five million, two hundred twenty-three thousand, four hundred twenty-one".