1453165221 has 8 divisors (see below), whose sum is σ = 1970393760. Its totient is φ = 952356752.

The previous prime is 1453165213. The next prime is 1453165237. The reversal of 1453165221 is 1225613541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1453165221 - 2³ = 1453165213 is a prime.

It is a super-2 number, since 2×1453165221² = 4223378319047957682, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1453165291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4104810 + ... + 4105163.

It is an arithmetic number, because the mean of its divisors is an integer number (246299220).

Almost surely, 2^1453165221 is an apocalyptic number.

It is an amenable number.

1453165221 is a deficient number, since it is larger than the sum of its proper divisors (517228539).

1453165221 is an equidigital number, since it uses as much as digits as its factorization.

1453165221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8210035.

The product of its digits is 7200, while the sum is 30.

The square root of 1453165221 is about 38120.4042607106. The cubic root of 1453165221 is about 1132.6741742453.

Adding to 1453165221 its reverse (1225613541), we get a palindrome (2678778762).

The spelling of 1453165221 in words is "one billion, four hundred fifty-three million, one hundred sixty-five thousand, two hundred twenty-one".