3502023221 has 4 divisors (see below), whose sum is σ = 3614991744. Its totient is φ = 3389054700.

The previous prime is 3502023211. The next prime is 3502023227. The reversal of 3502023221 is 1223202053.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1223202053 = 223 ⋅5485211.

It is a cyclic number.

It is not a de Polignac number, because 3502023221 - 2¹⁰ = 3502022197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3502023193 and 3502023202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3502023227) 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, 56484215 + ... + 56484276.

It is an arithmetic number, because the mean of its divisors is an integer number (903747936).

Almost surely, 2^3502023221 is an apocalyptic number.

3502023221 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3502023221 is a deficient number, since it is larger than the sum of its proper divisors (112968523).

3502023221 is a wasteful number, since it uses less digits than its factorization.

3502023221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112968522.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 3502023221 is about 59177.8946989499. The cubic root of 3502023221 is about 1518.5869862780.

Adding to 3502023221 its reverse (1223202053), we get a palindrome (4725225274).

The spelling of 3502023221 in words is "three billion, five hundred two million, twenty-three thousand, two hundred twenty-one".