1055513321 has 2 divisors, whose sum is σ = 1055513322. Its totient is φ = 1055513320.

The previous prime is 1055513297. The next prime is 1055513341. The reversal of 1055513321 is 1233155501.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 926350096 + 129163225 = 30436^2 + 11365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1055513321 is a prime.

It is a super-2 number, since 2×1055513321² = 2228216741616898082, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1055513341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 527756660 + 527756661.

It is an arithmetic number, because the mean of its divisors is an integer number (527756661).

Almost surely, 2^1055513321 is an apocalyptic number.

It is an amenable number.

1055513321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1055513321 is an equidigital number, since it uses as much as digits as its factorization.

1055513321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 1055513321 is about 32488.6645000991. The cubic root of 1055513321 is about 1018.1722107577.

Adding to 1055513321 its reverse (1233155501), we get a palindrome (2288668822).

The spelling of 1055513321 in words is "one billion, fifty-five million, five hundred thirteen thousand, three hundred twenty-one".