1326200551 has 32 divisors (see below), whose sum is σ = 1557964800. Its totient is φ = 1118396160.

The previous prime is 1326200507. The next prime is 1326200567. The reversal of 1326200551 is 1550026231.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1326200551 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 (1326200501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 823435 + ... + 825043.

It is an arithmetic number, because the mean of its divisors is an integer number (48686400).

Almost surely, 2^1326200551 is an apocalyptic number.

1326200551 is a deficient number, since it is larger than the sum of its proper divisors (231764249).

1326200551 is a wasteful number, since it uses less digits than its factorization.

1326200551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1759.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1326200551 is about 36417.0365488462. The cubic root of 1326200551 is about 1098.6762453561.

Adding to 1326200551 its reverse (1550026231), we get a palindrome (2876226782).

The spelling of 1326200551 in words is "one billion, three hundred twenty-six million, two hundred thousand, five hundred fifty-one".