1552340421321 has 16 divisors (see below), whose sum is σ = 2086833192960. Its totient is φ = 1026397144080.

The previous prime is 1552340421263. The next prime is 1552340421347. The reversal of 1552340421321 is 1231240432551.

It is not a de Polignac number, because 1552340421321 - 2¹⁰ = 1552340420297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1552340421371) 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, 3079465 + ... + 3547926.

It is an arithmetic number, because the mean of its divisors is an integer number (130427074560).

Almost surely, 2^{1552340421321} is an apocalyptic number.

It is an amenable number.

1552340421321 is a deficient number, since it is larger than the sum of its proper divisors (534492771639).

1552340421321 is a wasteful number, since it uses less digits than its factorization.

1552340421321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6628036.

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 1552340421321 its reverse (1231240432551), we get a palindrome (2783580853872).

The spelling of 1552340421321 in words is "one trillion, five hundred fifty-two billion, three hundred forty million, four hundred twenty-one thousand, three hundred twenty-one".