1223110551 has 32 divisors (see below), whose sum is σ = 1774035648. Its totient is φ = 745113600.

The previous prime is 1223110523. The next prime is 1223110561. The reversal of 1223110551 is 1550113221.

It is not a de Polignac number, because 1223110551 - 2⁷ = 1223110423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223110501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3049951 + ... + 3050351.

It is an arithmetic number, because the mean of its divisors is an integer number (55438614).

Almost surely, 2^1223110551 is an apocalyptic number.

1223110551 is a deficient number, since it is larger than the sum of its proper divisors (550925097).

1223110551 is a wasteful number, since it uses less digits than its factorization.

1223110551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 1223110551 is about 34972.9974551796. The cubic root of 1223110551 is about 1069.4370786363.

Adding to 1223110551 its reverse (1550113221), we get a palindrome (2773223772).

The spelling of 1223110551 in words is "one billion, two hundred twenty-three million, one hundred ten thousand, five hundred fifty-one".