7453443221 has 4 divisors (see below), whose sum is σ = 8518220832. Its totient is φ = 6388665612.

The previous prime is 7453443211. The next prime is 7453443269. The reversal of 7453443221 is 1223443547.

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: 1223443547 = 419 ⋅2919913.

It is a de Polignac number, because none of the positive numbers 2^k-7453443221 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 (7453443211) 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, 532388795 + ... + 532388808.

It is an arithmetic number, because the mean of its divisors is an integer number (2129555208).

Almost surely, 2^7453443221 is an apocalyptic number.

It is an amenable number.

7453443221 is a deficient number, since it is larger than the sum of its proper divisors (1064777611).

7453443221 is a wasteful number, since it uses less digits than its factorization.

7453443221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064777610.

The product of its digits is 80640, while the sum is 35.

The square root of 7453443221 is about 86333.3262477475. The cubic root of 7453443221 is about 1953.3751078796.

Adding to 7453443221 its reverse (1223443547), we get a palindrome (8676886768).

The spelling of 7453443221 in words is "seven billion, four hundred fifty-three million, four hundred forty-three thousand, two hundred twenty-one".