1322321551 has 4 divisors (see below), whose sum is σ = 1329173152. Its totient is φ = 1315469952.

The previous prime is 1322321527. The next prime is 1322321569. The reversal of 1322321551 is 1551232231.

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 1322321551 - 2¹⁷ = 1322190479 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 (1322321501) 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, 3425511 + ... + 3425896.

It is an arithmetic number, because the mean of its divisors is an integer number (332293288).

Almost surely, 2^1322321551 is an apocalyptic number.

1322321551 is a deficient number, since it is larger than the sum of its proper divisors (6851601).

1322321551 is an equidigital number, since it uses as much as digits as its factorization.

1322321551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6851600.

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

The square root of 1322321551 is about 36363.7395079219. The cubic root of 1322321551 is about 1097.6040276858.

Adding to 1322321551 its reverse (1551232231), we get a palindrome (2873553782).

The spelling of 1322321551 in words is "one billion, three hundred twenty-two million, three hundred twenty-one thousand, five hundred fifty-one".