1223531130551 has 4 divisors (see below), whose sum is σ = 1224399500400. Its totient is φ = 1222662760704.

The previous prime is 1223531130539. The next prime is 1223531130583. The reversal of 1223531130551 is 1550311353221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1223531130551 - 2³⁸ = 948653223607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223531133551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 434182811 + ... + 434185628.

It is an arithmetic number, because the mean of its divisors is an integer number (306099875100).

Almost surely, 2^{1223531130551} is an apocalyptic number.

1223531130551 is a deficient number, since it is larger than the sum of its proper divisors (868369849).

1223531130551 is an equidigital number, since it uses as much as digits as its factorization.

1223531130551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868369848.

The product of its (nonzero) digits is 13500, while the sum is 32.

Adding to 1223531130551 its reverse (1550311353221), we get a palindrome (2773842483772).

The spelling of 1223531130551 in words is "one trillion, two hundred twenty-three billion, five hundred thirty-one million, one hundred thirty thousand, five hundred fifty-one".