1021223553 has 12 divisors (see below), whose sum is σ = 1583938800. Its totient is φ = 583556232.

The previous prime is 1021223551. The next prime is 1021223597. The reversal of 1021223553 is 3553221201.

It is a happy number.

1021223553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1021223553 - 2¹ = 1021223551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021223551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3473403 + ... + 3473696.

It is an arithmetic number, because the mean of its divisors is an integer number (131994900).

Almost surely, 2^1021223553 is an apocalyptic number.

It is an amenable number.

1021223553 is a deficient number, since it is larger than the sum of its proper divisors (562715247).

1021223553 is an equidigital number, since it uses as much as digits as its factorization.

1021223553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6947116 (or 6947109 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 1021223553 is about 31956.5885694953. The cubic root of 1021223553 is about 1007.0250507632.

Adding to 1021223553 its reverse (3553221201), we get a palindrome (4574444754).

The spelling of 1021223553 in words is "one billion, twenty-one million, two hundred twenty-three thousand, five hundred fifty-three".