1323523551 has 16 divisors (see below), whose sum is σ = 2019954944. Its totient is φ = 755115264.

The previous prime is 1323523543. The next prime is 1323523571. The reversal of 1323523551 is 1553253231.

It is not a de Polignac number, because 1323523551 - 2³ = 1323523543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323523571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35506 + ... + 62511.

It is an arithmetic number, because the mean of its divisors is an integer number (126247184).

Almost surely, 2^1323523551 is an apocalyptic number.

1323523551 is a deficient number, since it is larger than the sum of its proper divisors (696431393).

1323523551 is an equidigital number, since it uses as much as digits as its factorization.

1323523551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98670.

The product of its digits is 13500, while the sum is 30.

The square root of 1323523551 is about 36380.2632068543. The cubic root of 1323523551 is about 1097.9365036722.

Adding to 1323523551 its reverse (1553253231), we get a palindrome (2876776782).

The spelling of 1323523551 in words is "one billion, three hundred twenty-three million, five hundred twenty-three thousand, five hundred fifty-one".