1552255321 has 4 divisors (see below), whose sum is σ = 1574118144. Its totient is φ = 1530392500.

The previous prime is 1552255277. The next prime is 1552255337. The reversal of 1552255321 is 1235522551.

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 1552255321 - 2¹³ = 1552247129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1552255381) 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, 10931305 + ... + 10931446.

It is an arithmetic number, because the mean of its divisors is an integer number (393529536).

Almost surely, 2^1552255321 is an apocalyptic number.

It is an amenable number.

1552255321 is a deficient number, since it is larger than the sum of its proper divisors (21862823).

1552255321 is an equidigital number, since it uses as much as digits as its factorization.

1552255321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21862822.

The product of its digits is 15000, while the sum is 31.

The square root of 1552255321 is about 39398.6715638992. The cubic root of 1552255321 is about 1157.8555607573.

Adding to 1552255321 its reverse (1235522551), we get a palindrome (2787777872).

The spelling of 1552255321 in words is "one billion, five hundred fifty-two million, two hundred fifty-five thousand, three hundred twenty-one".