1653013221 has 16 divisors (see below), whose sum is σ = 2270051904. Its totient is φ = 1069161984.

The previous prime is 1653013199. The next prime is 1653013247. The reversal of 1653013221 is 1223103561.

It is not a de Polignac number, because 1653013221 - 2⁵ = 1653013189 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1653013191 and 1653013200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1653013291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18090 + ... + 60276.

It is an arithmetic number, because the mean of its divisors is an integer number (141878244).

Almost surely, 2^1653013221 is an apocalyptic number.

It is an amenable number.

1653013221 is a deficient number, since it is larger than the sum of its proper divisors (617038683).

1653013221 is a wasteful number, since it uses less digits than its factorization.

1653013221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42580.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 1653013221 is about 40657.2652917040. The cubic root of 1653013221 is about 1182.3846302229.

Adding to 1653013221 its reverse (1223103561), we get a palindrome (2876116782).

The spelling of 1653013221 in words is "one billion, six hundred fifty-three million, thirteen thousand, two hundred twenty-one".