2145535321 has 2 divisors, whose sum is σ = 2145535322. Its totient is φ = 2145535320.

The previous prime is 2145535313. The next prime is 2145535331. The reversal of 2145535321 is 1235355412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1523731225 + 621804096 = 39035^2 + 24936^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145535321 - 2³ = 2145535313 is a prime.

It is not a weakly prime, because it can be changed into another prime (2145535331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072767660 + 1072767661.

It is an arithmetic number, because the mean of its divisors is an integer number (1072767661).

Almost surely, 2^2145535321 is an apocalyptic number.

It is an amenable number.

2145535321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145535321 is an equidigital number, since it uses as much as digits as its factorization.

2145535321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18000, while the sum is 31.

The square root of 2145535321 is about 46319.9235858610. The cubic root of 2145535321 is about 1289.7688669085.

The spelling of 2145535321 in words is "two billion, one hundred forty-five million, five hundred thirty-five thousand, three hundred twenty-one".