1653621122 has 32 divisors (see below), whose sum is σ = 2611889280. Its totient is φ = 784143360.

The previous prime is 1653621107. The next prime is 1653621149. The reversal of 1653621122 is 2211263561.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 781538 + ... + 783650.

It is an arithmetic number, because the mean of its divisors is an integer number (81621540).

Almost surely, 2^1653621122 is an apocalyptic number.

1653621122 is a deficient number, since it is larger than the sum of its proper divisors (958268158).

1653621122 is a wasteful number, since it uses less digits than its factorization.

1653621122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2378.

The product of its digits is 4320, while the sum is 29.

The square root of 1653621122 is about 40664.7405254233. The cubic root of 1653621122 is about 1182.5295543928.

Adding to 1653621122 its reverse (2211263561), we get a palindrome (3864884683).

The spelling of 1653621122 in words is "one billion, six hundred fifty-three million, six hundred twenty-one thousand, one hundred twenty-two".