2145532553 has 2 divisors, whose sum is σ = 2145532554. Its totient is φ = 2145532552.

The previous prime is 2145532531. The next prime is 2145532567. The reversal of 2145532553 is 3552355412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2139247504 + 6285049 = 46252^2 + 2507^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145532553 - 2⁸ = 2145532297 is a prime.

It is not a weakly prime, because it can be changed into another prime (2145532453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072766276 + 1072766277.

It is an arithmetic number, because the mean of its divisors is an integer number (1072766277).

Almost surely, 2^2145532553 is an apocalyptic number.

It is an amenable number.

2145532553 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145532553 is an equidigital number, since it uses as much as digits as its factorization.

2145532553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90000, while the sum is 35.

The square root of 2145532553 is about 46319.8937067001. The cubic root of 2145532553 is about 1289.7683122557.

Adding to 2145532553 its reverse (3552355412), we get a palindrome (5697887965).

The spelling of 2145532553 in words is "two billion, one hundred forty-five million, five hundred thirty-two thousand, five hundred fifty-three".