1453224021 has 4 divisors (see below), whose sum is σ = 1937632032. Its totient is φ = 968816012.

The previous prime is 1453223977. The next prime is 1453224053. The reversal of 1453224021 is 1204223541.

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: 1204223541 = 3 ⋅401407847.

It is a cyclic number.

It is not a de Polignac number, because 1453224021 - 2⁹ = 1453223509 is a prime.

It is a super-2 number, since 2×1453224021² = 4223720110422816882, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1453223982 and 1453224000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1453224061) 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, 242204001 + ... + 242204006.

It is an arithmetic number, because the mean of its divisors is an integer number (484408008).

Almost surely, 2^1453224021 is an apocalyptic number.

It is an amenable number.

1453224021 is a deficient number, since it is larger than the sum of its proper divisors (484408011).

1453224021 is an equidigital number, since it uses as much as digits as its factorization.

1453224021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484408010.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1453224021 is about 38121.1754934184. The cubic root of 1453224021 is about 1132.6894513206.

Adding to 1453224021 its reverse (1204223541), we get a palindrome (2657447562).

The spelling of 1453224021 in words is "one billion, four hundred fifty-three million, two hundred twenty-four thousand, twenty-one".