2152193509 has 2 divisors, whose sum is σ = 2152193510. Its totient is φ = 2152193508.

The previous prime is 2152193453. The next prime is 2152193543. The reversal of 2152193509 is 9053912512.

2152193509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1944545409 + 207648100 = 44097^2 + 14410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2152193509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2152193579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1076096754 + 1076096755.

It is an arithmetic number, because the mean of its divisors is an integer number (1076096755).

Almost surely, 2^2152193509 is an apocalyptic number.

It is an amenable number.

2152193509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2152193509 is an equidigital number, since it uses as much as digits as its factorization.

2152193509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24300, while the sum is 37.

The square root of 2152193509 is about 46391.7396634358. The cubic root of 2152193509 is about 1291.1016587204.

The spelling of 2152193509 in words is "two billion, one hundred fifty-two million, one hundred ninety-three thousand, five hundred nine".