2143522553 has 2 divisors, whose sum is σ = 2143522554. Its totient is φ = 2143522552.

The previous prime is 2143522531. The next prime is 2143522567. The reversal of 2143522553 is 3552253412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1775189689 + 368332864 = 42133^2 + 19192^2 .

It is a cyclic number.

It is not a de Polignac number, because 2143522553 - 2⁶ = 2143522489 is a prime.

It is a super-4 number, since 4×2143522553⁴ (a number of 38 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (2143522573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071761276 + 1071761277.

It is an arithmetic number, because the mean of its divisors is an integer number (1071761277).

Almost surely, 2^2143522553 is an apocalyptic number.

It is an amenable number.

2143522553 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143522553 is an equidigital number, since it uses as much as digits as its factorization.

2143522553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36000, while the sum is 32.

The square root of 2143522553 is about 46298.1916817493. The cubic root of 2143522553 is about 1289.3654217188.

Adding to 2143522553 its reverse (3552253412), we get a palindrome (5695775965).

The spelling of 2143522553 in words is "two billion, one hundred forty-three million, five hundred twenty-two thousand, five hundred fifty-three".