2145521153 has 2 divisors, whose sum is σ = 2145521154. Its totient is φ = 2145521152.

The previous prime is 2145521149. The next prime is 2145521233. The reversal of 2145521153 is 3511255412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1884601744 + 260919409 = 43412^2 + 16153^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145521153 - 2² = 2145521149 is a prime.

It is a super-2 number, since 2×2145521153² = 9206522035940898818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2145521453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072760576 + 1072760577.

It is an arithmetic number, because the mean of its divisors is an integer number (1072760577).

Almost surely, 2^2145521153 is an apocalyptic number.

It is an amenable number.

2145521153 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145521153 is an equidigital number, since it uses as much as digits as its factorization.

2145521153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6000, while the sum is 29.

The square root of 2145521153 is about 46319.7706492595. The cubic root of 2145521153 is about 1289.7660279145.

Adding to 2145521153 its reverse (3511255412), we get a palindrome (5656776565).

The spelling of 2145521153 in words is "two billion, one hundred forty-five million, five hundred twenty-one thousand, one hundred fifty-three".