1553111122 has 4 divisors (see below), whose sum is σ = 2329666686. Its totient is φ = 776555560.

The previous prime is 1553111113. The next prime is 1553111123. The reversal of 1553111122 is 2211113551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2211113551 = 17 ⋅130065503.

It can be written as a sum of positive squares in only one way, i.e., 1552281201 + 829921 = 39399^2 + 911^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1553111093 and 1553111102.

It is not an unprimeable number, because it can be changed into a prime (1553111123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 388277779 + ... + 388277782.

Almost surely, 2^1553111122 is an apocalyptic number.

1553111122 is a deficient number, since it is larger than the sum of its proper divisors (776555564).

1553111122 is an equidigital number, since it uses as much as digits as its factorization.

1553111122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776555563.

The product of its digits is 300, while the sum is 22.

The square root of 1553111122 is about 39409.5308523205. The cubic root of 1553111122 is about 1158.0683075236.

Adding to 1553111122 its reverse (2211113551), we get a palindrome (3764224673).

The spelling of 1553111122 in words is "one billion, five hundred fifty-three million, one hundred eleven thousand, one hundred twenty-two".