1552340321 has 4 divisors (see below), whose sum is σ = 1774103232. Its totient is φ = 1330577412.

The previous prime is 1552340263. The next prime is 1552340323. The reversal of 1552340321 is 1230432551.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1552340321 - 2¹⁰ = 1552339297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1552340323) 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, 110881445 + ... + 110881458.

It is an arithmetic number, because the mean of its divisors is an integer number (443525808).

Almost surely, 2^1552340321 is an apocalyptic number.

It is an amenable number.

1552340321 is a deficient number, since it is larger than the sum of its proper divisors (221762911).

1552340321 is an equidigital number, since it uses as much as digits as its factorization.

1552340321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221762910.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 1552340321 is about 39399.7502657060. The cubic root of 1552340321 is about 1157.8766947217.

Adding to 1552340321 its reverse (1230432551), we get a palindrome (2782772872).

The spelling of 1552340321 in words is "one billion, five hundred fifty-two million, three hundred forty thousand, three hundred twenty-one".