1223350551 has 12 divisors (see below), whose sum is σ = 1824064320. Its totient is φ = 789258240.

The previous prime is 1223350507. The next prime is 1223350553. The reversal of 1223350551 is 1550533221.

It is a happy number.

1223350551 is a `hidden beast` number, since 122 + 33 + 505 + 5 + 1 = 666.

It is not a de Polignac number, because 1223350551 - 2¹⁵ = 1223317783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223350553) 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, 2192106 + ... + 2192663.

It is an arithmetic number, because the mean of its divisors is an integer number (152005360).

Almost surely, 2^1223350551 is an apocalyptic number.

1223350551 is a deficient number, since it is larger than the sum of its proper divisors (600713769).

1223350551 is a wasteful number, since it uses less digits than its factorization.

1223350551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4384806 (or 4384803 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 1223350551 is about 34976.4285054950. The cubic root of 1223350551 is about 1069.5070227398.

Adding to 1223350551 its reverse (1550533221), we get a palindrome (2773883772).

The spelling of 1223350551 in words is "one billion, two hundred twenty-three million, three hundred fifty thousand, five hundred fifty-one".